Researcher Profile and Settings

Master

Affiliation (Master)

• Faculty of Engineering　Applied Chemistry　Chemical Engineering

Affiliation (Master)

• Faculty of Engineering　Applied Chemistry　Chemical Engineering

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Profile and Settings

Affiliation

• Hokkaido University, Faculty of Engineering, Associate Professor

Degree

• Mr. Eng.（2011/03 Department of Chemical System Engineering, The University of Tokyo）
• Dr. Eng.（2014/03 Department of Chemical System Engineering, The University of Tokyo）

Profile and Settings

• Name (Japanese)

  Tada

• Name (Kana)

  Shohei

• Name

  201801002555898348

Alternate Names

https://cse-lab.eng.hokudai.ac.jp/

Affiliation

• Hokkaido University, Faculty of Engineering, Associate Professor

Achievement

Research Interests

• x-ray absorption spectroscopy   Infrared spectroscopy   nanoparticle   Solid Catalyst   電気化学   吸着   反応機構   触媒化学   CO2 conversion   Heterogeneous catalyst   

Research Areas

• Nanotechnology/Materials / Inorganic materials / Inorganic materials/Physical properties
• Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Chemical reaction and process system engineering
• Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Catalytic processes and resource chemistry

Research Experience

• 2024/04 - Today Hokkaido University Faculty of Engineering Associate Professor
• 2022/10 - 2024/03 Hokkaido University Faculty of Engineering Assistant Prof.
• 2020/04 - 2022/09 Ibaraki University Department of Materials Science and Engineering Assistant Professor
• 2018/04 - 2020/03 The University of Tokyo The Graduate School of Engineering, Department of Chemical System Engineering
• 2016/01 - 2018/03 Seikei University Department of Materials and Life Science Research fellow
• 2015/04 - 2018/03 JSPS Research Fellow (PD)
• 2014/05 - 2015/12 ETH Zurich D-CHAB Academic guest
• 2014/04 - 2015/03 The University of Tokyo Department of Chemical System Engineering Postdoctoral fellow
• 2013/04 - 2015/03 JSPS Research Fellow (DC2)

Education

•        - 2014/03  The University of Tokyo  The Graduate School of Engineering  Department of Chemical System Engineering
•        - 2009/03  The University of Tokyo  The Faculty of Engineering  Department of Chemical System Engineering

Committee Memberships

• 2024/05   触媒学会   参照触媒委員
• 2024/05   触媒学会   討論会委員
• 2021/04 -2024/03   石油学会   論文誌編集委員
• 2021/04 -2023/03   化学工学会   化工誌編集委員
• 2021/04 -2022/12   触媒学会   第5回 東日本キャタリシスセミナー 世話人
• 2022/03   触媒学会   水素の製造と利用のための触媒技術研究会 世話人
• 2021/10   化学工学会   反応工学部会触媒反応工学分科会 幹事
• 2021/04   ⽔素エネルギー協会   水素エネルギーシステム 編集委員
• 2019/09   化学工学会   エネルギー部会エネルギー変換デバイス・システム分科会 幹事

Awards

• 2024/04 一般社団法人化学情報協会 JAICI賞
   

  受賞者: 多田昌平
• 2024/03 一般財団法人 田中貴金属記念財団 Young Researcher Award
   貴金属触媒を用いたCO2からのメタノール合成における副反応抑制メカニズムの解明 

  受賞者: Shohei Tada
• 2024/03 北海道大学 令和5年度工学研究院若手教員奨励賞
   

  受賞者: 多田昌平
• 2024/03 Catalysis Society of Japan Catalysis Society of Japan Award for Young Researchers
   メタノールの再吸着に着目した二酸化炭素水素化触媒の開発 

  受賞者: Shohei Tada
• 2023/08 一般社団法人触媒学会 北海道支部 Excellent reserach award
   低温メタノール合成を志向した新規パラジウム触媒の開発 

  受賞者: 岡崎未奈;小林芳男;山内紀子;菊地隆司;多田昌平
• 2023/03 化学工学会 第25回化学工学会学生発表会 優秀賞
   PMMA粒子表面へのポリアニリンナノファイバー形成によるウニ型粒子の作製 

  受賞者: 北由弥香;多田昌平;小林芳男;山内紀子
• 2023/03 化学工学会 第25回化学工学会学生発表会 優秀賞
   バイオガスから有用物質を合成する新規触媒の検討 

  受賞者: 小倉有里加;山内紀子;小林芳男;多田昌平
• 2022/06 公益社団法人新化学技術推進協会 GSC賞奨励賞
   火炎噴霧熱分解法を活用した新規固体触媒の開発とCO2有価物変換への応用 

  受賞者: 多田昌平、藤原翔
• 2022/05 石油学会 石油学会奨励賞（千代田化工建設賞）
   触媒前駆体構造に着目した二酸化炭素水素化によるメタノール合成用触媒の創製 

  受賞者: 多田昌平
• 2022/05 石油学会 石油学会論文賞
   溶融LiCl-KClとCaH2還元剤を用いたNiZn金属間化合物ナノ粉末の低温合成 

  受賞者: 小林 靖和、宗宮 穣、多田 昌平、菊地 隆司
• 2022/04 文部科学省 令和4年度科学技術分野の文部科学大臣表彰 若手科学者賞
   反応機構に立脚した二酸化炭素水素化触媒の開発研究 

  受賞者: 多田昌平
• 2022/03 化学工学会反応工学部会 化学工学会反応工学部会研究賞
   複合金属酸化物の物性に着目したCO2水素化触媒の開拓 

  受賞者: 多田昌平
• 2022/01 国立大学法人茨城大学 令和３年度 国立大学法人茨城大学学長学術表彰 奨励賞
   

  受賞者: 多田 昌平
• 2021/03 The Society of Chemical Engineers, Japan The SCEJ Award for Outstanding Young Researcher
   二酸化炭素資源化技術への非晶質材料の展開 

  受賞者: Shohei Tada
• 2019/05 Kumagai Foundation for Science and Technology Kumagai Research Grant in 2019
   固体酸化物形燃料電池の排熱利用にむけたドライ改質触媒の低温作動化 

  受賞者: Shohei Tada
• 2015/03 The Society of Chemical Engineers, Japan Outstanding Paper Award of 2014
   Novel Nickel Catalysts based on Spinel-Type Mixed Oxides for Methane and Propane Steam Reforming 

  受賞者: Ryuji Kikuchi;Misato Yokoyama;Shohei Tada;Atsushi Takagaki;Takashi Sugawara;S Ted Oyama
• 2014/03 東京大学大学院工学系研究科 工学系研究科長賞（研究）
   

  受賞者: 多田昌平
• 2013/09 EFCATS PhD Student Award
   

  受賞者: Shohei Tada
• 2013 触媒学会若手会 夏の研修会 優秀ポスター発表賞
   

  受賞者: 多田昌平

Published Papers

• Fabrication of metallic titanium nanoparticles through ultrasonication assisted by electric current flow

  Shiori Sato, Yoshiki Ueno, Soichiro Takiguchi, Noriko Yamauchi, Shohei Tada, Yoshio Kobayashi

  Advanced Powder Technology 35 (7) 104551 - 104551 0921-8831 2024/07
• Difference in reaction mechanism between ZnZrOx and InZrOx for CO2 hydrogenation.

  Shohei Tada, Yurika Ogura, Motohiro Sato, Akihiro Yoshida, Tetsuo Honma, Masahiko Nishijima, Tatsuya Joutsuka, Ryuji Kikuchi

  Physical chemistry chemical physics : PCCP 26 (18) 14037 - 14045 2024/05/08 

  Oxide solid-solution catalysts, such as Zn-doped ZrO2 (ZnZrOx) and In-doped ZrO2 (InZrOx), exhibit distinctive catalytic capabilities for CH3OH synthesis via CO2 hydrogenation. We investigated the active site structures of these catalysts and their associated reaction mechanisms using both experimental and computational approaches. Electron microscopy and X-ray absorption spectroscopy reveal that the primary active sites are isolated cations, such as Zn2+ and In3+, dissolved in tetragonal ZrO2. Notably, for Zn2+, decomposition of the methoxy group, which is an essential intermediate in CH4 synthesis, is partially suppressed because of the relatively high stability of the methoxy group. Conversely, the methyl group strongly adsorbs on In3+, facilitating the conversion of the methoxy species into methyl groups. The decomposition of CH3OH is also suggested to contribute to CH4 synthesis. These results highlight the generation of CH4 as a byproduct of the InZrOx catalyst. Understanding the active site structure and elucidating the reaction mechanism at the atomic level are anticipated to contribute significantly to the future development of oxide solid-solution catalysts.
• Synthesis and Color Durability of Silver Nanoparticles Immobilized on Silica Particles

  Keigo Araki, Noriko Yamauchi, Shohei Tada, Yoshio Kobayashi

  Journal of Cluster Science 35 (5) 1573 - 1586 1040-7278 2024/04/13
• Synthesis of gold nanoparticle-immobilized biodegradable polymer nanoparticles and their degradation properties

  Keisuke Akino, Ayumi Takahashi, Noriko Yamauchi, Shohei Tada, Takumu Takase, Mone Kimura, Shigeharu Nakao, Kohsuke Gonda, Yoshio Kobayashi

  Chemical Papers 78 (5) 3343 - 3353 0366-6352 2024/02/08
• Low-Temperature CO2 Methanation over Ru Nanoparticles Supported on Monoclinic Zirconia

  Shohei Tada, Tomona Jinushizono, Kenya Ishikawa, Shinta Miyazaki, Takashi Toyao, Ken-ichi Shimizu, Masahiko Nishijima, Noriko Yamauchi, Yoshio Kobayashi, Ryuji Kikuchi

  Energy & Fuels 2024/02/01
• Aerobic oxidative coupling of 2-naphthols catalyzed by flame-made VO /t-ZrO2: Effect of metal oxide support and VO content on catalytic activity

  Masaru Kondo, Shohei Tada, Takao Shioiri, Hiroki Nakajima, Masahiko Nishijima, Tetsuo Honma, Kakeru Fujiwara

  Applied Catalysis A: General 119638 - 119638 0926-860X 2024/02
• High-pressure in situ X-ray absorption fine structure measurements for hydrogenation of CO₂ to methanol over Zn-doped ZrO₂

  Shohei Tada, Kazumasa Oshima, Tastuya Joutsuka, Masahiko Nishijima, Ryuji Kikuchi, Tetsuo Honma

  Catalysis Science & Technology 2044-4753 2024 

  During CO₂ hydrogenation under pressurised conditions, slight distortions were observed in the Zn structure. Our DFT calculations revealed that the adsorption of CO₂ at Zr⁴⁺ sites near Zn species can induce these structural distortions.
• Postsynthetically Tailoring Acid Properties and Pore Structures of ZnZrOx/MFI Catalysts for One-Pass CO2 Hydrogenation

  Duanxing Li, Xiaofei Lu, Hiroka Kinoshita, Masanori Takemoto, Anand Chokkalingam, Shohei Tada, Kenta Iyoki

  ACS Engineering Au 2023/10/18
• Fabrication of glucose-immobilizing fluorescent polymer particles with high magnetic responsiveness

  Noriko Yamauchi, Yosuke Noshiro, Shohei Tada, Keisuke Sato, Makoto Ogata, Yoshio Kobayashi

  PARTICULATE SCIENCE AND TECHNOLOGY 0272-6351 2023/10 [Refereed]
   

  Glycan-immobilizing particles are useful for a wide variety of biomedical applications, such as the detection, separation, and purification of proteins, viruses, and bacteria, which can be specifically bound by the glycan moieties. One strategy for the quick and accurate detection of these components is to collect the particles magnetically after binding the components to the particle surface. We fabricated core-shell particles composed of a magnetic core and a thin polymer shell. The shell was incorporated with a fluorescent dye with glucose molecules immobilized on its surface. As the magnetic core, we selected Fe3O4 particles. Taking into consideration its low environmental impact, we adopted soap-free emulsion polymerization to form the polymer shell. Thus, methyl methacrylate was polymerized in the presence of Fe3O4 particles, octyl-beta-d-glucopyranoside, and rhodamine B to generate a glucose-capped fluorescent PMMA thin shell on the Fe3O4 particles. The resulting particles exhibited a saturation magnetization of similar to 53 emu/g. The novelty of this research is that glucose-immobilized polymer particles with excellent magnetic properties that can be collected in 5 s using a magnet can be synthesized with an environmentally friendly method.
• Optimal mixing method of ZnZrO and MOR-type zeolite to prepare a bifunctional catalyst for CO2 hydrogenation to lower olefins

  Shohei Tada, Hiroka Kinoshita, Duanxing Li, Masahiko Nishijima, Harune Yamaguchi, Ryuji Kikcuhi, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki

  Advanced Powder Technology 34 (10) 104174 - 104174 0921-8831 2023/10
• Electrolytic synthesis of metallic aluminum nanoparticles in aqueous solution

  Takefumi Hosoya, Shiori Sato, Yoshiki Ueno, Ayumi Takahashi, Noriko Yamauchi, Shohei Tada, Yoshio Kobayashi

  Journal of Nanoparticle Research 25 (8) 1388-0764 2023/07/31
• Precise tuning of the properties of MOR-type zeolite nanoparticles to improve lower olefins selectivity in composite catalysts for CO2 hydrogenation

  Ryusei Oishi, Duanxing Li, Mina Okazaki, Hiroka Kinoshita, Nagomu Ochiai, Noriko Yamauchi, Yoshio Kobayashi, Toru Wakihara, Tatsuya Okubo, Shohei Tada, Kenta Iyoki

  Journal of CO2 Utilization 72 102491 - 102491 2212-9820 2023/06
• Intermetallic Compound TiM (M=Co, Fe) with a Layered Structure Prepared by Deoxidizing Ilmenite‐type Oxides in Molten LiCl‐CaH₂ Mixtures

  Yasukazu Kobayashi, Tomota Nagaura, Azhar Alowasheeir, Shohei Tada, Yusuke Yamauchi

  Chemistry – A European Journal 29 (32) 0947-6539 2023/04/25 

  Abstract CsCl‐type intermetallic compounds TiM (M=Co, Fe) were obtained by deoxidizing trigonal ilmenite‐type MTiO₃ with a reducing agent CaH₂ in molten LiCl at 600 °C. X‐ray diffraction, nitrogen adsorption, scanning electron microscopy, and transmission electron microscopy with energy‐dispersive X‐ray, and X‐ray photoelectron spectroscopy analyses revealed the formation of nanoscale layered structures, which enhanced specific surface areas (approximately 20 m²/g) in the intermetallic compounds. In the initial deoxidation stage, Li₂TiO₃‐like compounds were observed as an intermediate, suggesting the substitution of M in MTiO₃ by Li from the molten LiCl. Compound MTiO₃ has a layered structure perpendicular to the c axis of the trigonal structure, suggesting that the layered structures may originate from the crystal structure of the precursors. Formation of the Li₂TiO₃‐like intermediate may help maintain the original layered structure during deoxidation and the subsequent alloying at temperatures as low as 600 °C.
• Synthesis of metallic titanium nanoparticles with a combination of ultrasonication and flowing of electric current

  Shiori Sato, Takehiro Yonezawa, Noriko Yamauchi, Shohei Tada, Yoshio Kobayashi

  Nano-Structures & Nano-Objects 34 100957 - 100957 2352-507X 2023/04
• Synthesis and sintering properties of silica-coated titanium nitride particles

  Shoya Kobayashi, Noriko Yamauchi, Shohei Tada, Yoshio Kobayashi

  Advanced Powder Technology 34 (4) 103979 - 103979 0921-8831 2023/04
• Adsorption of CO₂ on Amorphous and Crystalline Zirconia: A DFT and Experimental Study

  Tatsuya Joutsuka, Shohei Tada

  The Journal of Physical Chemistry C 127 (14) 6998 - 7008 1932-7447 2023/03/30
• Synthesis of Au nanoparticles coated with silica containing polyethylene glycol for extracorporeally dischargeable X-ray contrast agents

  Takeru Sakamoto, Noriko Yamauchi, Shohei Tada, Takumu Takase, Mone Kimura, Chihiro Nishidate, Kohsuke Gonda, Yoshio Kobayashi

  Journal of Nanoparticle Research 25 (4) 1388-0764 2023/03/27
• Highly Dispersed Zn Sites on ZrO2 by Flame Spray Pyrolysis for CO2 Hydrogenation to Methanol

  Kakeru Fujiwara, Taiki Akutsu, Masahiko Nishijima, Shohei Tada

  Topics in Catalysis 1022-5528 2023/03/27
• Heterogeneous Cu Catalyst for CO₂-to-Methanol Hydrogenation Importance of Catalyst Precursor Structure

  Shohei TADA

  Journal of the Japan Petroleum Institute 66 (2) 40 - 47 1346-8804 2023/03/01
• Catalysis of surface dispersed Cu²⁺ species on t-ZrO₂: square-planar Cu catalyzed cross-coupling of arylboronic acid and imidazole

  Masaru Kondo, Tatsuya Joutsuka, Kakeru Fujiwara, Tetsuo Honma, Masahiko Nishijima, Shohei Tada

  Catalysis Science & Technology 2044-4753 2023 

  We examined the Chan–Lam cross-coupling of imidazole and arylboronic acids under additive-free and mild conditions using heterogeneous CuO/MO_X catalysts such as metal oxide-supported CuO and Cu-doped metal oxides.
• Direct conversion of carbon dioxide and steam into hydrocarbons and oxygenates using solid acid electrolysis cells

  Naoya Fujiwara, Shohei Tada, Ryuji Kikuchi

  iScience 105381 - 105381 2589-0042 2022/11
• Active sites on ZnxZr1-xO2-x solid solution catalysts for CO2-to-methanol hydrogenation

  Shohei Tada*, Nagomu Ochiai, Hiroka Kinoshita, Mitsuhiro Yoshida, Natsumi Shimada, Tatsuya Joutsuka*, Masahiko Nishijima, Tetsuo Honma, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki

  ACS Catalysis ACS in press 2022/06 [Refereed][Not invited]
  
• Understanding the structure of Cu-doped MgAl2O4 for CO2 hydrogenation catalyst precursor using experimental and computational approaches

  Tatsuya Joutsuka, Ryu Hamamura, Kakeru Fujiwara, Tetsuo Honma, Masahiko Nishijima, Shohei Tada

  Int. J. Hydrogen Energy Elsevier in press 2022/05/27 [Refereed]
  
• Superior catalytic performance of intermetallic CaPt2 nanoparticles supported on titanium group oxides in hydrogenation of ketones to alcohols

  Yasukazu Kobayashi, Shohei Tada, Masaru Kondo, Kakeru Fujiwara, Hiroshi Mizoguchi

  CHEMICAL COMMUNICATIONS 58 (30) 4795 - 4798 1359-7345 2022/04 [Refereed]
   

  Intermetallic CaPt2 nanoparticles, supported on titanium group oxides, were prepared using a molten salt method with CaH2 as both the reducing agent and the calcium source. The nanoparticles exhibited superior catalytic activity compared to a commercial Pt/C catalyst in the hydrogenation of ketones to alcohols, which could be promoted by electron-rich Pt sites in CaPt2.
• Intermetallic YIr2 nanoparticles with negatively charged Ir active sites for catalytic hydrogenation of cyclohexanone to cyclohexanol

  Yasukazu Kobayashi, Shohei Tada, Masaru Kondo, Kakeru Fujiwara, Hiroshi Mizoguchi

  CATALYSIS SCIENCE & TECHNOLOGY 2044-4753 2022/04 [Refereed]
   

  Intermetallic YIr2 nanoparticles with a high surface area (55 m(2) g(-1)) were prepared from Y2O3 as a Y source using a molten salt method. The alloyed nanoparticles catalyzed the hydrogenation of cyclohexanone to cyclohexanol similarly to the Pt/C catalyst, whereas Y2O3-/SiO2-supported Ir produced no cyclohexanol. Because we found via density functional theory calculations that the electronic configuration of the negatively charged Ir ion in YIr2 was close to Pt-0, the unique catalytic activity in YIr2 could mainly be due to the charge transfer from Y to Ir.
• Influence of Si/Al ratio of MOR type zeolites for bifunctional catalysts specific to the one-pass synthesis of lower olefins via CO2 hydrogenation

  Shohei Tada, Duanxing Li, Mina Okazaki, Hiroka Kinoshita, Masahiko Nishijima, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki

  Catalysis Today 411-412 0920-5861 2022 [Refereed][Invited]
   

  Highly efficient CO2 utilization methodologies should be developed to reduce greenhouse gas emissions. Combining methanol synthesis (CO2-to-methanol) catalysts and methanol conversion (methanol-to-olefins) catalysts realizes one-pass hydrocarbon production via CO2 hydrogenation. We focused on ZnO/ZrO2 as metal-oxide-based catalysts for methanol synthesis and MOR zeolites as solid acid catalysts for methanol conversion. These catalysts were physically mixed to produce bifunctional catalysts which work at relatively low pressure (10 bars). Compositions of zeolite catalysts, especially Si/Al ratios, are important since composition influences on properties of zeolites, such as acid density and strength. MOR zeolites with varied Si/Al ratios were tested and found MOR zeolites with Si/Al ratio of 104 showed the best olefin selectivity. The relation between coke formation behavior and acid sites was discussed for explaining catalytic activities. The novel bifunctional catalysts and knowledge of selectivity provide a new methodology for CO2 utilization.
• Electrochemically promoted ammonia synthesis on an Fe/BaZr0.8Y0.2O3-delta catalyst at ambient pressure

  Yao Yuan, Shohei Tada, Ryuji Kikuchi

  SUSTAINABLE ENERGY & FUELS 6 (2) 458 - 465 2398-4902 2022/01 [Refereed]
   

  Electrochemically promoted nitrogen reduction on solid-state electrolytes is a promising approach for synthesising ammonia (NH3) under mild conditions. In this study, yttrium-doped barium zirconate (BZY) was chosen as a solid-state electrolyte owing to its high chemical stability and NH3 production on an Fe/BZY catalyst was investigated under open-circuit conditions and polarised conditions in a N-2-H-2 gas mixture at 500 degrees C and ambient pressure. NH3 production was enhanced under applied voltages, and the highest production rate of 3.07 x 10(-9) mol (s cm(2))(-1) was achieved under polarised conditions. The reaction rates were observed to change gradually as the reaction progressed, both in the open-circuit state and under applied voltages. This slow response of the NH3 production rate was modelled, and the electrochemical promotion of NH3 production was explained by the gradual removal of H adatoms from the catalyst and the resultant increase in N adsorption sites. The modelling result indicated that a higher ratio of adsorbed nitrogen atoms (N*) to adsorbed hydrogen atoms (H-s) contributed to accelerating the NH3 production rate.
• An in situ DRIFTS study on nitrogen electrochemical reduction over an Fe/BaZr_0.8Y_0.2O_3−δ-Ru catalyst at 220 °C in an electrolysis cell using a CsH₂PO₄/SiP₂O₇ electrolyte

  Yao Yuan, Naoya Fujiwara, Shohei Tada, Ryuji Kikuchi

  RSC Advances 12 (14) 8474 - 8476 2022 [Refereed]
   

  In situ DRIFTS measurements of an Fe/BZY-Ru cathode catalyst in an electrolysis cell using a CsH₂PO₄/SiP₂O₇ electrolyte were carried out in a mixed N₂–H₂ gas flow under polarization.
• Dimethyl ether steam reforming utilizing γ-Al2O3 and Cu-based catalysts derived from Mg1-xCuxAl2O4

  Shohei Tada, Fumito Ostuka, Ryuji Kikuchi

  Journal of the Japan Petroleum Institute 64 (5) 226 - 237 1346-8804 2021/09 [Refereed][Invited]
   

  Dimethyl ether (DME) steam reforming reaction is a sequential reaction of DME hydrolysis (catalyst: solid acid) followed by methanol steam reforming (catalyst: Cu-based catalyst). Combination of the catalysts can produce H-2 from DME and H2O in one pass. DME hydrolysis proceeds slowly at low temperatures, so the catalyst for DME steam reforming must be operated at relatively high temperatures (300-400 degrees C). Since this temperature range is higher than that of the typical methanol steam reforming reaction (200-300 degrees C), a methanol steam reforming catalyst must be developed to operate at 300 degrees C or higher, with high activity and durability. This study focused on spinel-type oxide MgAl2O4, which has a high surface area and high durability, and found a new catalyst precursor, Mg1-xCuxAl2O4. Spinel-type oxide-supported Cu catalyst was synthesized by reducing the catalyst precursor with H-2. The synthesized Cu catalyst combined with gamma-Al2O3, which is a solid acid catalyst, exhibited high DME steam reforming reaction activity. The optimum ratio of the Cu catalyst and gamma-Al2O3 was in the range of 1 to 2 by weight. This catalyst can be regenerated by calcining in air.
• Promotion of Hydrogen Oxidation and Methane Dry Reforming Over Ni-SDC Anode by Basic Oxide Additives

  Ryuji Kikuchi, Tomohro Mishina, Taro Kayamori, Naoya Fujiwara, Shohei Tada

  ECS Transactions 103 1615  2021/07 [Refereed][Not invited]
  
• Effect of Sm doping on CO2-to-methanol hydrogenation of Cu/amorphous-ZrO2 catalysts

  Taihei Yamamura, Shohei Tada, Ryuji Kikuchi, Kakeru Fujiwara, Tetsuo Honma

  The Journal of Physical Chemistry C 125 15899 - 15909 2021/07 [Refereed][Not invited]
  
• Low-Temperature Chemical Synthesis of Intermetallic TiFe Nanoparticles for Hydrogen Absorption

  Yasukazu Kobayashi, Shohei Yamaoka, Shunta Yamaguchi, Nobuko Hanada, Shohei Tada, Ryuji Kikuchi

  International Journal of Hydrogen Energy 46 22611 - 22617 2021/05 [Refereed][Not invited]
  
• Mechanochemical Effect in Mixing Sponge Copper with Amorphous ZrO2 Creates an Effective Active Sites for Methanol Synthesis from CO2 Hydrogenation

  Kazumasa Oshima, Yuka Honma, Kazuya Kinoshita, Zhiming Gao, Tetsuo Honma, Shohei Tada, Shigeo Satokawa

  The Journal of Physical Chemistry C 125 (15) 8155 - 8162 1932-7447 2021/04 [Refereed][Not invited]
  
• What are the best active sites for CO2 methanation over Ni/CeO2?

  Shohei Tada, Hironori Nagase, Naoya Fujiwara, Ryuji Kikuchi

  Energy & Fuels 35 (6) 5241 - 5251 0887-0624 2021/03 [Refereed][Not invited]
  
• Porous Intermetallic Ni2XAl (X = Ti or Zr) Nanoparticles Prepared from Oxide Precursors

  Yasukazu Kobayashi, Shohei Tada, Ryuji Kikuchi

  Nanoscale Advances 3 (7) 1901 - 1905 2021/02 [Refereed][Not invited]
   

  Chemical synthesis of porous intermetallic Ni₂XAl (X = Ti or Zr) nanoparticles with small crystal size (24–34 nm) and high surface area (10–71 m² g⁻¹).

• Chemical route to prepare nickel supported on intermetallic Ti₆Si₇Ni₁₆ nanoparticles catalyzing CO methanation

  Yasukazu Kobayashi, Shohei Tada, Hiroshi Mizoguchi

  Nanoscale 13 (39) 16533 - 16542 2040-3364 2021 

  Ti₆Si₇Ni₁₆ support can accelerate the rate determining step of C–O bond dissociation in CO methanation due to its good electron donation capacity.
• Search for solid acid catalysts aiming at the development of bifunctional tandem catalysts for the one-pass synthesis of lower olefins via CO2 hydrogenation

  Shohei Tada, Hiroka Kinoshita, Nagomu Ochiai, Anand Chokkalingam, Peidong Hu, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki

  International Journal of Hydrogen Energy in press 2021 [Refereed][Not invited]
  
• Influence of reaction temperature on CO2-to-methanol hydrogenation over MZrOx (M = Al, Mn, Cu, Zn, Ga, and In)

  Shohei Tada, Kenta Iyoki

  Chemistry Letters 50 724 - 726 2021/01 [Refereed][Not invited]
  
• Ammonia synthesis using Fe/BZY-RuO2 catalysts and a cesium dihydrogen phosphate-based electrolyte at intermediate temperatures

  Yao Yuan, Shohei Tada, Ryuji Kikuchi

  Materials Advances 2 (2) 793 - 83 2021/01 [Refereed][Not invited]
   

  In this study, we developed an Fe2O3/BZY (yttrium-doped barium zirconate)-RuO2 (Fe/BZY-RuO2) cathode catalyst, which was applied to the electrochemical synthesis of NH3 using a proton-conducting electrolyte, CsH2PO4/SiP2O7, at 220 degrees C and ambient pressure. The highest faradaic efficiency of 7.1% was achieved at -0.4 V (vs. open-circuit voltage (OCV)) and the highest NH3 yield rate of 4.5 x 10(-10) mol (s cm(2))(-1) was achieved at -1.5 V (vs. OCV). We also successfully detected N2H4 and NH3 at -0.2 V (vs. OCV), which indicated that the N-2 reduction proceeded via an associative mechanism. A potentiostatic pulse experiment was conducted under a feed of Ar or N-2 in the cathode at different applied voltages to investigate the N-2 reduction reaction (NRR) mechanism. A model was developed to fit the current response of the potentiostatic pulse experiment, which comprised the decomposition of adsorbed intermediates on the surface of the cathode catalyst, diffusion of H in the cathode catalyst, and an electrical double layer. The results revealed that the rate constant estimated by the model for the decomposition of intermediates, such as NH or N2H, was lowest at -0.2 V, where N2H4 was detected. The fitting results also indicated that the NRR proceeded via an associative mechanism at lower applied voltages, while a dissociative mechanism dominated at higher applied voltages.
• A Novel Continuous Method for the Preparation of Methanol Synthesis Catalysts by Flame Spray Pyrolysis

  Shohei Tada, Kakeru Fujiwara

  Earozoru Kenkyu 日本エアロゾル学会 35 (4) 253 - 264 2020/12/01 [Refereed][Invited]
  
• Development of CO2-to-Methanol Hydrogenation Catalyst by Focusing on the Coordination Structure of the Cu species in Spinel-type Oxide Mg1-xCuxAl2O4

  Tada, Shohei, Otsuka, Fumito, Fujiwara, Kakeru, Moularas, Constantinos, DELIGIANNAKIS, YIANNIS, Kinoshita, Yuki, Uchida, Sayaka, Honma, Tetsuo, Nishijima, Masahiko, Kikuchi, Ryuji

  ACS Catalysis 15186 - 15194 2155-5435 2020/12 [Refereed][Not invited]
  
• Hydrogen Production by Steam Electrolysis in Solid Acid Electrolysis Cells

  Naoya Fujiwara, Hironori Nagase, Shohei Tada, Ryuji Kikuchi

  ChemSusChem 14 417 - 427 1864-5631 2020/11/17 [Refereed][Not invited]
  
• Low-Temperature Synthesis of Single Phase Intermetallic NiZn bulk Nanopowder in a Molten LiCl-KCl with a CaH2 as a reducing agent

  Yasukazu Kobayashi, Minoru Sohmiya, Shohei Tada, Ryuji Kikuchi

  Journal of the Japan Petroleum Institute in press (6) 380 - 387 1346-8804 2020/11 [Refereed][Not invited]
  
• Dimethyl ether synthesis from CO2-H2 mixture over Cu/amorphous-ZrO2 mixed with FER-type zeolite

  Kazumasa Oshima, Shiori Nakajima, Shohei Tada, Ryuji Kikuchi, Shigeo Satokawa

  Journal of the Japan Petroleum Institute in press (6) 388 - 393 1346-8804 2020/11 [Refereed][Not invited]
  
• Calcium-Modified Ni-SDC Anodes in Solid Oxide Fuel Cells for Direct Dry Reforming of Methane

  Tomohiro Mishina, Naoya Fujiwara, Shohei Tada, Atsushi Takagaki, Ryuji Kikuchi, Shigeo Ted Oyama

  Journal of The Electrochemical Society 167 (13) 134512 - 134512 0013-4651 2020/09/30 [Refereed][Not invited]
   

  Direct internal reforming is one of the promising methods of utilizing hydrocarbon fuels in solid oxide fuel cells (SOFCs). Among direct internal reforming technologies, dry reforming of methane (DRM) is attracting attention as an alternative to steam reforming of methane. In this study, a cermet material composed of nickel and samarium-doped ceria (Ni-SDC) was investigated as an SOFC anode for the direct internal DRM operation. Compared to a conventional nickel-yttria-stabilized zirconia (Ni-YSZ) anode, the Ni-SDC anode showed superior current-voltage characteristics. However, poor carbon balances were recorded in anode outlet gas analysis, indicating coke formation on the Ni-SDC anode. The addition of calcium to the Ni-SDC anode was also tested. Measured anode outlet gas compositions suggested that the calcium addition suppressed coke formation, while the power generation performance of the pristine Ni-SDC anode was maintained. Microscopic observations showed that a certain part of the calcium additive existed as CaO particles on the anode surface, which could be responsible for the improved coking resistance.
• Effects of Porosity and Ni/Al Molar Ratio in Ni–Al Oxide Precursors on Porous Intermetallic Nickel Aluminide Nanopowders Prepared by Chemical Route

  Yasukazu Kobayashi, Shohei Tada, Ryuji Kikuchi

  JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 53 (9) 562 - 568 0021-9592 2020/09/20 [Refereed][Not invited]
  
• Regeneration behavior of reforming catalysts based on perovskite oxides LaM0.95Rh0.05O3 (M: Cr, Co, Fe) by redox treatment

  Shohei Tada, Takamasa Ono, Ryuji Kikuchi

  Fuel 269 117459 - 117459 0016-2361 2020/06 [Refereed][Not invited]
  
• Simple Chemical Synthesis of Ternary Intermetallic RENi₂Si₂ (RE = Y, La) Nanoparticles in Molten LiCl–CaH₂ System

  Yasukazu Kobayashi, Shohei Tada, Ryuji Kikuchi

  MATERIALS TRANSACTIONS 61 (5) 1037 - 1040 1345-9678 2020/05/01 [Refereed][Not invited]
  
• Mesoporous Intermetallic NiAl Nanocompound Prepared in a Molten LiCl Using Calcium Species as Templates

  Yasukazu Kobayashi, Shohei Tada, Ryuji Kikuchi

  Chemistry Letters 49 (4) 341 - 343 0366-7022 2020/04/05 [Refereed][Not invited]
  
• Flame spray pyrolysis makes highly loaded Cu nanoparticles on ZrO2 for CO2-to-methanol hydrogenation

  Shohei Tada, Kakeru Fujiwara, Taihei Yamamura, Masahiko Nishijima, Sayaka Uchida, Ryuji Kikuchi

  Chemical Engineering Journal 381 122750  1385-8947 2020/02/01 [Refereed][Not invited]
   

  © 2019 Elsevier B.V. This paper deals with CuO/ZrO2 catalysts with extremely high Cu loading and their catalytic activity for CO2 hydrogenation to methanol. Because of aiming an industrial application, we chose a flame spray pyrolysis (FSP) technique as a simple and rapid catalyst preparation method. Thanks to the FSP, we succeeded to prepare 20–80 wt% CuO/ZrO2 catalysts. Interestingly, the catalyst structure changed with the Cu loading. In the case of Cu loading = 20 wt%, CuO nanoparticles (ca. 5 nm) were supported on tetragonal ZrO2 particles (5–10 nm), observed by high-angle annular dark-field scanning transmission electron microscopy. Of note, the catalyst with 60 wt% of Cu was ZrO2@CuO core-shell nanoparticles: ZrO2 aggregates were covered with many CuO nanoparticles (<5 nm). When the Cu loading was 80 wt%, crystalline CuO particles (ca. 10 nm) as well as CuO nanoparticles (<5 nm) were supported on the above ZrO2 aggregates. The catalysts reduced by H2 at 300 °C consisted of Cu nanoparticles (<20 nm) and ZrO2 nanoparticles (5–10 nm). With decreasing the Cu loading, the interaction between the Cu and the ZrO2 became strong. The strong interaction caused high selectivity to methanol. In contrast to 20 wtCu% CuO/ZrO2, 80 wtCu% CuO/ZrO2 contained a large number of active sites for CO2 conversion, while the interaction between Cu and ZrO2 was weak. Therefore, the catalyst exhibited high yield and low selectivity to methanol. Among the prepared catalysts, at Cu loading = 60 wt%, the catalytic performance was better than that of a commercial CuO/ZnO/Al2O3. This is because the catalyst combined the advantages of both the 20 wt% CuO/ZrO2 (Cu-ZrO2 interaction) and the 80 wt% CuO/ZrO2 (a large number of active sites).
• Direct electrochemical synthesis of oxygenates from ethane using phosphate-based electrolysis cells

  Yusuke Honda, Naoya Fujiwara, Shohei Tada, Yasukazu Kobayashi, Shigeo Ted Oyama, Ryuji Kikuchi

  Chemical Communications 56 (76) 11199 - 11202 1359-7345 2020 [Refereed][Not invited]
   

  Acetaldehyde and ethanol are produced at high rates by ethane partial oxidation at 220 °C and at atmospheric pressure using electrochemical cells.

• Simple chemical synthesis of intermetallic Pt2Y bulk nanopowder

  Yasukazu Kobayashi, Shohei Tada, Ryuji Kikuchi

  Materials Advances in press (7) 2202 - 2205 2020 [Refereed][Not invited]
   

  Intermetallic Pt2Y bulk nanopowder (2.9 m² g⁻¹, 28 nm) was chemically synthesized with approachable common chemicals and facilities.

• Ru nanoparticles supported on amorphous ZrO2 for CO2 methanation

  Hironori Nagase, Rei Naito, Shohei Tada, Ryuji Kikuchi, Kakeru Fujiwara, Masahiko Nishijima, Tetsuo Honma

  Catalysis Science & Technology 2044-4753 2020 [Refereed][Not invited]
   

  The influence of support materials and preparation methods on CO₂ methanation activity was investigated using Ru nanoparticles supported on amorphous ZrO₂ (am-ZrO₂), crystalline ZrO₂ (cr-ZrO₂), and SiO₂.

• Power-to-gas systems utilizing methanation reaction in solid oxide electrolysis cell cathodes: a model-based study

  Naoya Fujiwara, Shohei Tada, Ryuji Kikuchi

  Sustainable Energy & Fuels 4 (6) 2691 - 2706 2020 [Refereed][Not invited]
   

  A novel direct power-to-gas system utilizing solid oxide electrolysis cells was modelled and evaluated to clarify its potential advantages.

• Influences of particle size and crystallinity of highly loaded CuO/ZrO2 on CO2 hydrogenation to methanol

  Kakeru Fujiwara, Shohei Tada, Tetsuo Honma, Hiro Sasaki, Masahiko Nishijima, Ryuji Kikuchi

  AIChE Journal 65 (12) e16717  0001-1541 2019/12/01 [Refereed][Not invited]
   

  © 2019 American Institute of Chemical Engineers In this study, highly loaded CuO (65.2 wt%) on ZrO2 support was prepared by flame spray pyrolysis, and the effects of their particle sizes and ZrO2 crystallinity on CO2 hydrogenation to methanol were investigated. By varying the precursor feed rate (1–10 mL min−1), the crystallite size (3–7 nm) and the crystallinity of tetragonal ZrO2 were controlled. After H2 reduction at 300°C, the Cu species in the catalysts, prepared at the feed rate = 2–10 mL min−1, were converted to Cu particles (approximately 10–20 nm); however, the size and crystallinity of ZrO2 remained the same. The activity and selectivity of the catalysts prepared at the feed rate = 2–3 mL min−1 were higher than those of the catalysts prepared at the feed rates = 5–10 mL min−1, because the smaller ZrO2 particles in the former provided more surface to stabilize small Cu particles and from interfacial Cu-ZrO2 sites (active sites).
• Zr(IV) surface sites determine CH3OH formation rate on Cu/ZrO2/SiO2 - CO2 hydrogenation catalysts

  Erwin Lam, Kim Larmier, Shohei Tada, Patrick Wolf, Olga V. Safonova, Christophe Coperet

  Chinese Journal of Catalysis 40 1741 - 1748 2019/11 [Refereed][Not invited]
  
• Effects of Cu Precursor Type on the Catalytic Activity of Cu/ZrO2 towards Methanol Synthesis via CO2 Hydrogenation

  Shohei Tada, Kazumasa Oshima, Yoshihiro Noda, Ryuji Kikuchi, Minoru Sohmiya, Tetsuo Honma, Shigeo Satokawa

  Ind. Eng. Chem. Res. 58 (42) 19434 - 19445 0888-5885 2019/09 [Refereed][Not invited]
   

  Copyright © 2019 American Chemical Society. This paper presents the influence of different types of copper precursors on CO2-to-methanol hydrogenation over copper nanoparticles on amorphous ZrO2. Here, we chose copper nitrate hydrate, copper acetate hydrate, and a copper ammine complex as the precursor. A copper-acetate-based catalyst, which was precalcined at 350 °C, was more active and selective toward methanol than were the other catalysts. Regardless of the different copper precursors, after calcining a mixture of a copper precursor and amorphous ZrO2 at 350 °C, surface-dispersed Cu2+ species ([CuO4] square planes) were partly formed on amorphous ZrO2. The Cu2+ species was reduced by H2 to form Cu nanoparticles (<5 nm). This paper reports that using copper acetate monohydrate as a copper precursor leads to the greater number of active sites (Cu-a-ZrO2 interfacial sites) compared with the other precursors.
• Low Ni-containing Cermet Anodes of Solid Oxide Fuel Cells with Size-controlled Samarium-doped Ceria Particles

  Naoya Fujiwara, Tatsushi Minami, Ryuji Kikuchi, Atsushi Takagaki, Takashi Sugawara, Shohei Tada, S. Ted Oyama

  Journal of The Electrochemical Society 166 (12) F716 - F723 0013-4651 2019/07 [Refereed][Not invited]
   

  Ni-based cermet materials are typically used for anodes of solid oxide fuel cells. However, the Ni phase in such anodes can cause durability problems. One possible solution to the durability problems is to reduce the amount of Ni in the anode, although decreased Ni amount in turn reduces conductivity and electrochemical activity of the anode. In this study, Ni-SDC ( samarium-doped ceria) cermet anodes were prepared with different SDC particle sizes and Ni contents, and it was investigated how particle size ratio of the SDC and Ni affected the performance at low Ni contents. AC impedance analyses revealed that ohmic resistance was the primary factor affecting the current-voltage characteristics in the tested system, and it was found that large SDC particles were effective in reducing the ohmic resistance even with low Ni contents. The behavior of measured ohmic resistances of the anodes was well described by percolation theory, indicating that the electrical conductivity of the anodes was governed by the formation of connected Ni clusters. (C) 2019 The Electrochemical Society.
• High-performance Anode for Solid Acid Fuel Cells prepared by Mixing Carbon Substances with Anode Catalysts

  S. Tada, S. Tajima, N. Fujiwara, R. Kikuchi

  Int. J. Hydrogen Energy 44 26545 - 26553 2019 [Refereed][Not invited]
  
• Oxidative Coupling of Methane in Solid Oxide Electrolysis Cell

  Shu Kodama, Ryuji Kikuchi, Naoya Fujiwara, Shohei Tada, Yasukazu Kobayashi, S. Ted Oyama

  ECS Transactions 91 2697 - 2705 2019 [Refereed][Not invited]
  
• Hydrogen Oxidation Activity of SOFC Anodes with Metal Oxide Addition

  Naoya Fujiwara, Taro Kayamori, Tomohiro Mishina, Shohei Tada, Yasukazu Kobayashi, Ryuji Kikuchi

  ECS Transactions 91 1837 - 1844 2019 [Refereed][Not invited]
  
• Novel SOFC Anodes Using Pyrochlore-Type Mixed Conducting Materials

  Ryuji Kikuchi, Tomohito Sasouzaki, Shohei Tada

  ECS Transactions 91 1881 - 1888 2019 [Refereed][Not invited]
  
• Effect of Ag loading on CO2-to-methanol hydrogenation over Ag/CuO/ZrO2

  Shohei Tada, Shigeo Satokawa

  Catalysis Communications 113 41 - 45 1566-7367 2018/07/10 [Refereed][Not invited]
   

  The effect of Ag loading (wt%) of Ag/CuO/ZrO2 catalysts for the CO2 hydrogenation to methanol was investigated. The addition of a small amount of Ag (≤1 wt%) to CuO/ZrO2 did not change the turnover frequency of methanol production per exposed Cu sites (TOFmethanol) but increased the selectivity towards methanol due to a synergy developed between Cu and Ag, which was supported by H2-TPR studies.
• Isolated Zr Surface Sites on Silica Promotes Hydrogenation of CO2-to-CH3OH in Supported Cu Catalysts

  Erwin Lam, Kim Larmier, Patrick Wolf, Shohei Tada, Olga Safonova, Christophe Copéret

  Journal of the American Chemical Society 140 10530 - 10535 2018/07 [Refereed][Not invited]
  
• Design of Interfacial Sites between Cu and Amorphous ZrO2 Dedicated to CO2-to-Methanol Hydrogenation

  Shohei Tada, Shingo Kayamori, Tetsuo Honma, Hiromu Kamei, Akane Nariyuki, Kenichi Kon, Takashi Toyao, Ken-Ichi Shimizu, Shigeo Satokawa

  ACS Catalysis 8 (9) 7809 - 7819 2018/07 [Refereed][Not invited]
   

  © 2018 American Chemical Society. We examined the formation mechanism of active sites on Cu/ZrO2 specific toward CO2-to-methanol hydrogenation. The active sites on Cu/a-ZrO2 (a-: amorphous) were more suitable for CO2-to-methanol hydrogenation than those on Cu/t-ZrO2 (t-: tetragonal) and Cu/m-ZrO2 (m-: monoclinic). When a-ZrO2 was impregnated with a Cu(NO3)2·3H2O solution and then calcined under air, most of the Cu species entered a-ZrO2, leading to the formation of a Cu-Zr mixed oxide (CuaZr1-aOb). The H2 reduction of the thus-formed CuaZr1-aOb led to the formation of Cu nanoparticles on a-ZrO2, which can be dedicated to CO2-to-methanol hydrogenation. We concluded that the selective synthesis of CuaZr1-aOb, especially amorphous CuaZr1-aOb, is a key feature of the catalyst preparation. The preparation conditions of the amorphous CuaZr1-aOb specific toward CO2-to-methanol hydrogenation is as follows: (i) Cu(NO3)2·3H2O/a-ZrO2 is calcined at low temperature (350 °C in this study) and (ii) the Cu loading is low (6 and 8 wt % in this study). Via these preparation conditions, the characteristics of a-ZrO2 for the catalysts remained unchanged during the reaction at 230 °C. The latter preparation condition is related to the solubility limit of Cu species in a-ZrO2. Accordingly, we obtained the amorphous CuaZr1-aOb without forming crystalline CuO particles.
• Cu Species Incorporated into Amorphous ZrO2 with High Activity and Selectivity in CO2-to-Methanol Hydrogenation

  Shohei Tada, Ayaka Katagiri, Keiko Kiyota, Tetsuo Honma, Hiromu Kamei, Akane Nariyuki, Sayaka Uchida, Shigeo Satokawa

  Journal of Physical Chemistry C 122 (10) 5430 - 5442 1932-7455 2018/03/15 [Refereed][Not invited]
   

  We prepared Cu/a-ZrO2 (a-ZrO2: amorphous ZrO2), Cu/m-ZrO2 (m-ZrO2: monoclinic ZrO2), Cu/a-ZrO2/KIT-6, and Cu/t-ZrO2/KIT-6 (t-ZrO2: tetragonal ZrO2) by a simple impregnation method and examined the effect of the ZrO2 phase on CO2-to-methanol hydrogenation. We discovered a-ZrO2-containing catalysts with high activity and selectivity in CO2-to-methanol hydrogenation. Next, we focused on Cu species formation on the above-described catalysts. While pure CuO was observed on Cu/m-ZrO2 and Cu/t-ZrO2/KIT-6, copper-zirconium mixed oxide (CuxZryOz), not pure CuO, was formed on Cu/a-ZrO2 and Cu/a-ZrO2/KIT-6, as evidenced by X-ray absorption spectroscopy (XAS) and the powder color. After reducing a-ZrO2-containing catalysts with H2 at 300 °C, we observed highly dispersed Cu nanoparticles in close contact with a-ZrO2 (or CuxZryOz). In addition, methanol vapor sorption revealed that methanol adsorbed more weakly on a-ZrO2 than on m-ZrO2. Therefore, the high dispersion of Cu species and weak adsorption of methanol led to high activity and selectivity in CO2-to-methanol hydrogenation.
• Degradation factors of Ni/TiO2 catalysts for selective CO methanation: Effect of loss of residual Cl on catalyst

  Shohei Tada, Akihide Yanagita, Naohiro Shimoda, Tetsuo Honma, Makoto Takahashi, Akane Nariyuki, Shigeo Satokawa

  Journal of the Japan Petroleum Institute 61 (2) 80 - 86 1349-273X 2018 [Refereed][Not invited]
   

  Accelerated deterioration tests for selective CO methanation over Ni/TiO2 catalysts were conducted to study the catalyst degradation factors. The accelerated deterioration test treated the catalyst in the reaction gas flow at the specified temperature (200°C, 250°C, or 300°C) for 24 hr. After the accelerated deterioration test, the Ni/TiO2 selectivity in CO methanation was reduced due to the enhancement of an undesirable reverse water-gas shift reaction. Powder X-ray diffraction revealed unchanged TiO2 structure between the fresh and spent catalysts. In-situ X-ray absorption spectroscopy indicated that the H2-reduced Ni species were present as metallic Ni and remained unchanged in the fresh and spent catalysts. The number of surface Cl species for the spent catalyst was much smaller than that for the fresh catalyst. Thereby, disappearance of surface Cl components during the accelerated deterioration test caused the degradation of Ni/TiO2 catalysts for selective CO methanation.
• Methanol synthesis: Via CO2 hydrogenation over CuO-ZrO2 prepared by two-nozzle flame spray pyrolysis

  Shohei Tada, Kim Larmier, Robert Büchel, Christophe Copéret

  Catalysis Science and Technology Royal Society of Chemistry ({RSC}) 8 (8) 2056 - 2060 2044-4761 2018 [Refereed][Not invited]
   

  Methanol, a key chemical intermediate of the petrochemical industry, is produced by the hydrogenation of CO. Flame spray pyrolysis (FSP) approach was used as the catalyst preparation method because FSP is an industrial process capable of producing complex nanoparticle assemblies at several kg/hr. CuO-ZrO2 catalyst was prepared with a two-nozzle flame spray pyrolysis technique, which allows the change of CuO size without affecting the properties of the support. The performance of the CuO-ZrO2 catalyst was tested for CO2 hydrogenation to methanol, and compared to samples prepared using a physical mixture of CuO and ZrO2. A CuO-ZrO2 catalyst with smaller CuO particles had higher selectivity towards methanol at a given CO2 conversion compared to commercial CuO/ZnO/Al2O3 and CuO-ZrO2 with large CuO particles. The resulting catalyst also had a higher activity, normalized by mass of surface exposed copper, than the other catalysts studied.
• Sponge Ni catalyst with high activity in CO2 methanation

  Shohei Tada, Shun Ikeda, Naohiro Shimoda, Tetsuo Honma, Makoto Takahashi, Akane Nariyuki, Shigeo Satokawa

  INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 42 (51) 30126 - 30134 0360-3199 2017/12 [Refereed][Not invited]
   

  CO2 methanation over sponge Ni was investigated. When CO2 methanation was carried out using sponge Ni without any pretreatment, the sponge Ni exhibited a CO2 conversion of 83% at 250 degrees C under a high space velocity (0.11 mol(CO2) g(cat)(-1) h(-1)). We think that the sponge Ni is a promising new catalyst for CO2 methanation because it showed the high activity even under the high GHSV, and we can design a small plug flow reactor compared to a conventional reactor, resulting in a low manufacturing cost for the reactor. The high activity can be derived from the great number of crystal defects of fcc-Ni in the sponge Ni. On the other hand, with high-temperature pretreatment, the sponge Ni lost its activity in CO2 methanation as well as the surface defect sites. Thus, the activity loss can be explained by the disappearance of the surface defect sites by the high-temperature pretreatment. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
• Ag addition to CuO-ZrO2 catalysts promotes methanol synthesis via CO2 hydrogenation

  Shohei Tada, Fumihiro Watanabe, Keiko Kiyota, Naohiro Shimoda, Reina Hayashi, Makoto Takahashi, Akane Nariyuki, Akira Igarashi, Shigeo Satokawa

  JOURNAL OF CATALYSIS 351 107 - 118 0021-9517 2017/07 [Refereed][Not invited]
   

  The effect of adding Ag to CuO-ZrO2 catalysts for the hydrogenation of CO2 to methanol was investigated using CuO-ZrO2, Ag/CuO-ZrO2, and Ag/ZrO2. The addition of Ag to CuO-ZrO2 catalysts decreased the specific surface area and also broke its mesostructure. Thus, Ag played a significant role as a sintering aid in the preparation of Ag/CuO-ZrO2 catalysts. We note that the as-prepared Ag/CuO-ZrO2 catalysts contained Ag+ and Zrq+ (q < 4) sites and that the Zrq+ content increased with increasing Ag+ content. Furthermore, the presence of CuO in the Ag/CuO-ZrO2 catalyst appeared to stabilize Ag+ and Zrq+ species under air. Based on H-2 chemisorption and powder X-ray diffraction patterns, formation of a Ag-Cu alloy was observed on completely reduced and spent Ag/CuO-ZrO2 catalysts. Completely reduced Ag/CuO-ZrO2 catalysts exhibited a higher methanol production rate (7.5 mL h(-1) g(cat)(1)) compared to completely reduced CuO-ZrO2 (6.9 mL h(-1) g(cat)(1)) and Ag/ZrO2 catalysts (2.2 mL h(-1) g(cat)(1)) under the following reaction conditions: CO2/H-2/N-2 = 1/3/1, catalyst loading = 500 mg, W/F-total = 1000 mg(cat) s mL(-1), reaction temperature = 230 degrees C, pressure = 10 bar. (C) 2017 Elsevier Inc. All rights reserved.
• Gas Diffusion Electrode With Large Amounts of Gas Diffusion Channel Using Hydrophobic Carbon Fiber: For Oxygen Reduction Reaction at Gas/Liquid Interfaces

  Shohei Tada, Pantira Privatananupunt, Toshiyuki Iwasaki, Ryuji Kikuchi

  JOURNAL OF ELECTROCHEMICAL ENERGY CONVERSION AND STORAGE 14 (2) 2381-6872 2017/05 [Refereed][Not invited]
   

  For a gas diffusion cathode for oxygen reduction reaction (ORR) in aqueous alkaline electrolyte, it is important to create networks for O-2 gas diffusion, electronic conduction, and liquid-phase OH- transport in the cathode at once. In this study, we succeeded to fabricate a promising cathode using hydrophobic vapor grown carbon fibers (VGCF-Xs), instead of hydrophobic carbon blacks (CBs), as additives to its active layer (AL). Mercury porosimetry, as well as electrochemical impedance spectroscopy, showed that porosity of the cathode gradually increased with increasing the amount of the carbon fibers. In other words, addition of larger amount of the carbon fibers creates better O-2 gas diffusion channels. Also, the activation polarization resistance for the ORR increased as the carbon fibers' amount from 0 to 0.03-0.04 g and then dropped. In consequence, the cathode with 0.03 g of the carbon fibers exhibited the highest ORR performance among the prepared cathodes.
• CO2-to-Methanol Hydrogenation on Zirconia-Supported Copper Nanoparticles: Reaction Intermediates and the Role of the Metal-Support Interface

  Kim Larmier, Wei-Chih Liao, Shohei Tada, Erwin Lam, Rene Verel, Atul Bansode, Atsushi Urakawa, Aleix Comas-Vives, Christophe Coperet

  ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 56 (9) 2318 - 2323 1433-7851 2017/02 [Refereed][Not invited]
   

  Methanol synthesis by CO2 hydrogenation is a key process in a methanol-based economy. This reaction is catalyzed by supported copper nanoparticles and displays strong support or promoter effects. Zirconia is known to enhance both the methanol production rate and the selectivity. Nevertheless, the origin of this observation and the reaction mechanisms associated with the conversion of CO2 to methanol still remain unknown. A mechanistic study of the hydrogenation of CO2 on Cu/ZrO2 is presented. Using kinetics, in situ IR and NMR spectroscopies, and isotopic labeling strategies, surface intermediates evolved during CO2 hydrogenation were observed at different pressures. Combined with DFT calculations, it is shown that a formate species is the reaction intermediate and that the zirconia/copper interface is crucial for the conversion of this intermediate to methanol.
• Steam Reforming of Dimethyl Ether over Composite Catalysts of Supported Transition Metal Oxides and Cu/ZnO/Al2O3

  Fumito Otsuka, Shohei Tada, Ryuji Kikuchi

  JOURNAL OF THE JAPAN PETROLEUM INSTITUTE 59 (6) 293 - 298 1346-8804 2016/11 [Refereed][Not invited]
   

  Several supported transition metal oxides (X/Y, X = WO3, Nb2O5, Y = AL(2)O(3), TiO2, SiO2) were investigated as solid acid catalysts for hydrolysis of dimethyl ether (DME). Among the transition metal oxide catalysts tested, Nb2O5/Al2O3 showed the highest catalytic activity in the temperature range appropriate for DME steam reforming. Using several types of Nb2O5/Al2O3 samples, the effects of Nb2O5 loading amounts and calcination temperature on the catalytic activity were studied to enhance the hydrolysis activity. XRD patterns showed AINbO(4) phase appeared when the calcination temperature was over 800 degrees C. The BET surface area decreased for the increase in the calcination temperature. For Nb2O5/Al2O3, the acid amount increased consistently with the Nb2O5 loading amounts up to 25 wt%, and it became almost constant for the further increase in the Nb2O5 loadings. 25 wt% (Nb2O5Al2O3)-Al-/ catalyst calcined at 500 degrees C exhibited the highest catalytic activity for DME hydrolysis, and consequently steam reforming of DME was carried out over the Nb2O5/Al2O3 mixed with Cu/ZnO/Al2O3. It was found that an optimal ratio of Cu/ZnO/Al2O3 to Nb2O5/Al2O3 was 1, which resulted in higher catalytic activity for steam reforming of DME than a mixture of Cu/ZnO/Al2O3 and gamma-Al2O3.
• Surface Sites in Cu-Nanoparticles: Chemical Reactivity or Microscopy?

  Kim Larmier, Shohei Tada, Aleix Comas-Vives, Christophe Coperet

  JOURNAL OF PHYSICAL CHEMISTRY LETTERS 7 (16) 3259 - 3263 1948-7185 2016/08 [Refereed][Not invited]
   

  Copper nanoparticles are widely used in catalysis and electrocatalysis, and the fundamental understanding of their activity requires reliable methods to assess the number of potentially reactive atoms exposed on the surface. Herein, we provide a molecular understanding of the difference observed in addressing surface site titration using prototypical methods: transmission electron micrscopy (TEM), H-2 chemisorption, and N2O titration by a combination of experimental and theoretical study. We show in particular that microscopy does not allow assessing the amount of reactive surface sites, while H-2 and N2O chemisorptions can, albeit with slightly different stoichiometries (1 O/2Cu(S) and 1 H-2/2.2Cu(S)), which can be rationalized by density functional theory calculations. High-resolution TEM shows that the origin of the observed difference between microscopy and titration methods is due to the strong metal support interaction experienced by small copper nanoparticles with the silica surface.
• Physical mixing of TiO2 with sponge nickel creates new active sites for selective CO methanation

  S. Tada, D. Shoji, K. Urasaki, N. Shimoda, S. Satokawa

  CATALYSIS SCIENCE & TECHNOLOGY 6 (11) 3713 - 3717 2044-4753 2016 [Refereed][Not invited]
   

  Ni-alpha-Al2O3, Ni-SiO2, Ni-gamma-Al2O3, Ni-TiO2, and Ni-ZrO2 were prepared by physical mixing of metal oxides with sponge Ni, and the effect of physical contact of the metal oxides with sponge Ni on selective CO methanation was examined. The prepared Ni-TiO2 catalyst removed CO more deeply and suppressed CO2 methanation better relative to the other catalysts. The metal oxide nature of the prepared Ni catalysts affected the CO2 methanation activity, as well as the reverse water gas shift activity. Moreover, the catalytic performance for the five catalysts was not related to contact time. These results predicted the appearance of new active sites between sponge Ni and the metal oxides.
• Mechanistic study and catalyst development for selective carbon monoxide methanation

  S. Tada, R. Kikuchi

  CATALYSIS SCIENCE & TECHNOLOGY 5 (6) 3061 - 3070 2044-4753 2015 [Refereed][Not invited]
   

  Selective CO methanation has been attractive as a CO removal technique from reforming gases in polymer electrolyte fuel cell systems. The catalysts for the title reaction require the following two features: (i) high CO methanation activity at low temperatures and (ii) low CO2 methanation activity at high temperatures. In this review, we surveyed numerous studies of selective CO methanation using heterogeneous catalysts, and discussed its plausible mechanism. Furthermore, we summarized how the activity and selectivity of CO methanation can be affected by the particle size of active metals, support materials, and additives.
• CO2 Hydrogenation: Supported Nanoparticles vs. Immobilized Catalysts

  Shohei Tada, Indre Thiel, Hung-Kun Lo, Christophe Coperet

  CHIMIA 69 (12) 759 - 764 0009-4293 2015 [Refereed][Not invited]
   

  The conversion of CO2 to more valuable chemicals has been the focus of intense research over the past decades, and this field has become particularly important in view of the continuous increase of CO2 levels in our atmosphere and the need to find alternative ways to store excess energy into fuels. In this review we will discuss different strategies for CO2 conversion with heterogeneous and homogeneous catalysts. In addition, we will introduce some promising research concerning the immobilization of homogeneous catalysts on heterogeneous supports, as a hybrid of hetero- and homogeneous catalysts.
• Long-term durability of Ni/TiO2 and Ru-Ni/TiO2 catalysts for selective CO methanation

  Shohei Tada, Ryuji Kikuchi, Katsuya Wada, Kazuo Osada, Kazuya Akiyama, Shigeo Satokawa, Yoshimi Kawashima

  JOURNAL OF POWER SOURCES 264 59 - 66 0378-7753 2014/10 [Refereed][Not invited]
   

  Selective CO methanation was carried out over 10 wt%Ni/TiO2 and 0.5 wt%Ru-10 wt%Ni/TiO2, and the durability was examined. During the long-term test, both catalysts abated CO concentration from 0.25% (dry base) to less than 0.05% above ca. 175 degrees C with CO2 methanation suppressed. Ru-Ni/TiO2 exhibited the high activity of CO methanation compared to Ni/TiO2 during the test. Furthermore, for more than 5500 h, Ru-Ni/TiO2 maintained a wide temperature window for selective CO methanation (>50 degrees C), where CO and CH4 concentrations were <0.05% and <1%, respectively, at a high gas hourly space velocity of 10,000 h(-1). Over Ni/TiO2 and Ru-Ni/TiO2, CO2 methanation activity was initially enhanced, and then stabilized. The initial promotion of CO2 methanation activity is possibly due to the reduction of NiO which remained unreduced after the prereduction by H-2 at 450 degrees C. (C) 2014 Elsevier B.V. All rights reserved.
• Effect of metal addition to Ru/Ti02 catalyst on selective CO methanation

  Shohei Tada, Ryuji Kikuchi, Atsushi Takagaki, Takashi Sugawara, S. Ted Oyama, Shigeo Satokawa

  CATALYSIS TODAY 232 16 - 21 0920-5861 2014/09 [Refereed][Not invited]
   

  Selective CO methanation over Ru/Ti02, Ru-Ni/Ti02, Ru-Co/Ti02, Ru-Fe/Ti02, Ru-La/Ti02, Ru-K/Ti02, and Ru-Ni-La/TiO2 was investigated as a CO removal method from reformate gas for polymer electrolyte fuel cell applications, and the selectivity and activity were examined. The addition of Co and La to Ru/TiO2 improved both CO and CO2 methanation, while the addition of Ni raised only the activity for CO methanation. The addition of La increased the electron density in the Ru species, which likely enhanced the dissociation of the C-0 bond of CO on Ru probably due to back donation of electrons from Ru to CO. This led to high CO methanation activity over Ru-Laffi02. The trimetallic catalyst Ru-Ni-La/TiO2 showed the highest CO methanation activity among the prepared catalysts, resulting in a wider temperature range for selective CO methanation at low temperatures compared to Ru/Ti02. Crown Copyright 2013 Published by Elsevier B.V. All rights reserved.
• Effect of Ru and Ni ratio on selective CO methanation over Ru-Ni/TiO2

  Shohei Tada, Daisuke Minori, Fumito Otsuka, Ryuji Kikuchi, Kazuo Osada, Kazuya Akiyama, Shigeo Satokawa

  FUEL 129 219 - 224 0016-2361 2014/08 [Refereed][Not invited]
   

  The removal of CO from hydrogen-rich gas produced by steam reforming of hydrocarbons by selective CO methanation was investigated over xwt% Ru-ywt% Ni/TiO2 ( x = 0, 0.2, 0.3, 0.4, y = 0, 5, 9). The bimetallic catalyst Ru-Ni/TiO2 exhibited higher activity of CO methanation at low temperatures and lower activity of CO2 methanation at high temperatures than Ru/TiO2. Especially, 0.2 wt% Ru-9 wt% Ni/TiO2 was the most suitable catalyst for selective CO methanation. As for the prepared Ru-Ni/TiO2 catalysts, the reverse water gas shift ( RWGS) reaction was accelerated with an increase in the Ru loadings. Consequently the 0.2 wt% Ru-9 wt% Ni/TiO2 produced little CO due to the low activity of RWGS reaction, resulting in rapid abatement of CO at low temperatures and low production of CH4 at high temperatures compared to 0.3 wt% Ru-9 wt% Ni/TiO2 and 0.4 wt% Ru-9 wt% Ni/TiO2. (c) 2014 Elsevier Ltd. All rights reserved.
• Novel Nickel Catalysts Based on Spinel-Type Mixed Oxides for Methane and Propane Steam Reforming

  Ryuji Kikuchi, Misato Yokoyama, Shohei Tada, Atsushi Takagaki, Takashi Sugawara, S. Ted Oyama

  JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 47 (7) 530 - 535 0021-9592 2014/07 [Refereed][Not invited]
   

  Novel nickel catalysts based on magnesium aluminate spinel-type mixed oxides are developed as hydrocarbon reforming catalysts for hydrogen supply to polymer electrolyte fuel cells. The spinel catalysts were prepared by co-precipitation and the Pechini method, and the spinels prepared by the former method exhibited higher activity for methane steam reforming. The effect of spinel composition, Mg1-xNixAl2O4 (x = 0.17, 0.35, 0.50, 0.70, 1) was investigated on the activity and resistance to carbon deposition in steam reforming reaction. The turnover frequency for methane steam reforming at a steam-to-carbon (S/C) ratio of 2 increased with increase in the x value from 0.17 to 0.35, and then gradually decreased with further increase in the nickel content. The carbon deposition tolerance of the spinel catalysts was examined in propane steam reforming at S/C = 1 and 600 degrees C. The propane conversion during the reaction was ca. 98% over all catalysts tested, and the amount of deposited carbon, determined as carbon dioxide by temperature programmed oxidation, was least at x = 0.17, which is 1/8 of that deposited on a conventional Ni/gamma-Al2O3 catalyst. The spinels with x <= 0.5 exhibited smaller amounts of carbon deposition, and thus superior tolerance to deactivation.
• Promotion of CO2 methanation activity and CH4 selectivity at low temperatures over Ru/CeO2/Al2O3 catalysts

  Shohei Tada, Ochieng James Ochieng, Ryuji Kikuchi, Takahide Haneda, Hiromichi Kameyama

  INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 39 (19) 10090 - 10100 0360-3199 2014/06 [Refereed][Not invited]
   

  The effect of CeO2 loading amount of Ru/CeO2/Al2O3 on CO2 methanation activity and CH4 selectivity was studied. The CO2 reaction rate was increased by adding CeO2 to Ru/Al2O3, and the order of CO2 reaction rate at 250 degrees C is Ru/30%CeO2/Al2O3 > Ru/60%CeO2/Al2O3 > Ru/CeO2 > Ru/Al2O3. With a decrease in CeO2 loading of Ru/CeO2/Al2O3 from 98% to 30%, partial reduction of CeO2 surface was promoted and the specific surface area was enlarged. Furthermore, it was observed using FTIR technique that intermediates of CO2 methanation, such as formate and carbonate species, reacted with H-2 faster over Ru/30%CeO2/Al2O3 and Ru/CeO2 than over Ru/Al2O3. These could result in the high CO2 reaction rate over CeO2 containing catalysts. As for the selectivity to CH4, Ru/30%CeO2/Al2O3 exhibited high CH4 selectivity compared with Ru/CeO2, due to prompt CO conversion into CH4 over Ru/30%CeO2/Al2O3. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
• Preparation of Ru nanoparticles on TiO2 using selective deposition method and their application to selective CO methanation

  S. Tada, R. Kikuchi

  CATALYSIS SCIENCE & TECHNOLOGY 4 (1) 26 - 29 2044-4753 2014 [Refereed][Not invited]
   

  Selective CO methanation was investigated over Ru/TiO2 prepared using a selective deposition method with NaOH and NH3 aqueous solution as a pH adjuster. Control of pH by NH3 solution resulted in the small particle size of Ru (average 1.2 nm) and the formation of Na-free Ru/TiO2, leading to high CO methanation activity and a wide temperature window for selective CO methanation at low temperatures.
• Study of Ru-Ni/TiO2 catalysts for selective CO methanation

  Shohei Tada, Ryuji Kikuchi, Atsushi Takagaki, Takashi Sugawara, S. Ted Oyarria, Kohei Urasaki, Shigeo Satokawa

  APPLIED CATALYSIS B-ENVIRONMENTAL 140 258 - 264 0926-3373 2013/08 [Refereed][Not invited]
   

  The removal of CO from reformate streams by selective CO methanation was investigated over TiO2 supported Ru-Ni bimetallic and monometallic catalysts. The combination of Ru and Ni enhanced CO methanation at low temperatures. The introduction of Ni into Ru/TiO2 decreased the CO2 conversion rate at 260 degrees C from 10 to 7.3 mu mol min(-1) g(cat)(-1). The use of Ru and Ni, thus, expands the temperature range of selective CO methanation. Transmission electron microscopy and temperature programmed reduction by H-2 confirmed that Ru species were in close proximity to Ni species on Ru-Ni/TiO2, indicating a decrease in direct contact between Ru and TiO2. Fourier transform infrared spectroscopy techniques revealed that the decomposition of the formate species, formed during CO2 methanation, is slow over Ru-Ni/TiO2, in contrast to Ru/TiO2. (C) 2013 Elsevier B.V. All rights reserved.
• N2O Pulse Titration of Ni/alpha-Al2O3 Catalysts: A New Technique Applicable to Nickel Surface-Area Determination of Nickel-Based Catalysts

  Shohei Tada, Misato Yokoyama, Ryuji Kikuchi, Takahide Haneda, Hiromichi Kameyama

  JOURNAL OF PHYSICAL CHEMISTRY C 117 (28) 14652 - 14658 1932-7447 2013/07 [Refereed][Not invited]
   

  Transmission electron microscopy (TEM), CO pulse, and N2O pulse titration were applied to measuring Ni particle sizes on Ni/alpha-Al2O3 catalysts. It was clarified for the first time that the N2O pulse titration could estimate the size at titration temperature between 50 and 100 degrees C, which was confirmed by TEM observation. This agreement in the Ni particle sizes by N2O titration and TEM observation means that the Ni surface was fully covered with the monolayer of oxygen formed by N2O decomposition and the adsorption of N-2 and N2O on the catalysts was negligible. The Ni particle sizes estimated from the CO pulse technique were larger than those measured by the TEM observations. This is because the stoichiometry of CO to Ni was assumed to be one despite the complicated adsorption states of CO on Ni surface. On the contrary, the stoichiometry of oxygen to Ni using N2O pulse titration was one, which indicates that the stoichiometry measurements were not required for this method.
• Ni/CeO2 catalysts with high CO2 methanation activity and high CH4 selectivity at low temperatures

  Shohei Tada, Teruyuki Shimizu, Hiromichi Kameyama, Takahide Haneda, Ryuji Kikuchi

  INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 37 (7) 5527 - 5531 0360-3199 2012/04 [Refereed][Not invited]
   

  CO2 methanation was performed over 10 wt%Ni/CeO2, 10 wt%Ni/alpha-Al2O3, 10 wt%Ni/TiO2, and 10 wt%Ni/MgO, and the effect of support materials on CO2 conversion and CH4 selectivity was examined. Catalysts were prepared by a wet impregnation method, and characterized by BET, XRD, H-2-TPR and CO2-TPD. Ni/CeO2 showed high CO2 conversion especially at low temperatures compared to Ni/alpha-Al2O3, and the selectivity to CH4 was very close to 1. The surface coverage by CO2-derived species on CeO2 surface and the partial reduction of CeO2 surface could result in the high CO2 conversion over Ni/CeO2. In addition, superior CO methanation activity over Ni/CeO2 led to the high CH4 selectivity. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
• Effect of reduction pretreatment and support materials on selective CO methanation over supported Ru catalysts

  Shohei Tada, Ryuji Kikuchi, Kohei Urasaki, Shigeo Satokawa

  APPLIED CATALYSIS A-GENERAL 404 (1-2) 149 - 154 0926-860X 2011/09 [Refereed][Not invited]
   

  Selective CO methanation over Ru/Al(2)O(3) and Ru/TiO(2) was investigated as a CO removal method from reforming gas, and the effect of reduction treatment and the support materials on the selectivity and activity was examined. CO methanation activity was degraded over both Ru catalysts by raising reduction treatment temperature, which brought about Ru particle growth except for Ru/TiO(2) reduced at 600 degrees C. Ru/TiO(2) showed higher CO methanation activity than Ru/Al(2)O(3) due to smaller Ru particle size. A close correlation was found between CO(2) methanation rate and interfacial length of Ru particle and support, which indicates that the interface was identified as the reaction sites of CO(2) methanation in CO and CO(2) coexisting atmosphere. CO(2) methanation over Ru/TiO(2) was suppressed in spite of long length of the interface compared to Ru/Al(2)O(3), stemming from the small amount of CO(2) adsorbed onto Ru/TiO(2). Ru/TiO(2) catalyst exhibited wider temperature window for selective CO methanation than Ru/Al(2)O(3) catalyst. (C) 2011 Elsevier B.V. All rights reserved.

MISC

• What Are the Best Active Sites for CO2 Methanation over Ni/CeO2? (vol 35, pg 5241, 2021)

  Shohei Tada, Hironori Nagase, Naoya Fujiwara, Ryuji Kikuchi  ENERGY & FUELS  35-  (9)  8441  -8441  2021/05

Books etc

• 第2節 非晶質材料を用いたメタノール合成触媒の開発

  多田昌平 (Contributor)
  NTS 2022/05 (ISBN: 9784860437862) 315 47-54 

  二酸化炭素有効利用技術 第2編 二酸化炭素からの物質合成 第1章二酸化炭素を活用するための触媒開発
• 化学工学年鑑2021、10．資源・エネルギー 、10.3 燃料電池

  多田昌平 (Contributor)
  化学工学85（2021）554-555 2021/10 554-555
• 水素製造触媒の再生挙動の検討

  多田昌平 (Single work)
  ペトロテック 44 (2021) 475-479 2021/07
• フォーラム 直感を信じた先

  多田昌平 (Single work)
  触媒 63（2021）188 2021/04
• 在外研究MAP Eidgenössische Technische Hochschule Zürich

  多田昌平 (Single workペトロテック 43 (2020) 630-631.)
  2020/09
• 2019年度研究助成報告書「Cu種の配位構造に着目したCO2からのメタノール合成触媒の開発」

  多田昌平 (Single workペトロテック 43 (2020) 561-566.)
  2020/08
• 金属酸化物触媒を用いたCO2水素化反応

  多田昌平 (Single work触媒 62 (2020) 134.)
  2020/04
• The 161st Regular Study Group Material I "Development of new catalysts specific toward CO2-to-methanol hydrogenation"

  Tada Shohei (Single work水素エネルギーシステム 45, 44)
  Hydrogen Energy Systems Society of Japan 2020/03 1
• Methanol synthesis via CO2 hydrogenation

  Tada Shohei (Single work水素エネルギーシステム 45, 25-29)
  Hydrogen Energy Systems Society of Japan 2020/03 5
• Development of Catalysts for Methanol Synthesis by Hydrogenation of Carbon Dioxide

  Shohei Tada, Shigeo Satokawa (Joint workJournal of the Society of Inorganic Materials, Japan 27 13-17)
  2020/01
• 中温作動型燃料電池燃料極触媒の開発

  Shohei Tada, Ryuji Kikuchi (Joint workChemical Engineering, 64, 13-18)
  Kagakukogyosha 2019/11
• Future perspective of CO2-to-Methanol Hydrogenation Catalysts

  S. Tada, S. Satokawa (Joint workChemical Engineering of Japan 82 705-708)
  2018
• CO2からのメタノール合成反応機構に立脚したCu/ZrO2触媒の開発

  多田昌平, 柏森真吾, 片桐彩花, 本間徹生, 亀井啓, 成行あかね, 内田さやか, 里川重夫 (Joint work触媒（Catalysts and Catalysis） 60B 35-37)
  2018
• 担持Ru-Ni触媒におけるCO選択メタン化反応

  多田昌平, 菊地隆司, 高垣敦, 菅原孝, S.T Oyama (Joint work触媒（Catalysts and Catalysis） 56B 23-25)
  2014
• 第V編 第1章 PEFC用改質燃料からの新しいCO除去技術」菊地隆司編『次世代燃料電池開発の最前線』

  多田昌平・菊地隆司 (Joint work)
  CMC 2013/09 9 193-201
• 次世代燃料電池開発の最前線“第V編 第1章 PEFC用改質燃料からの新しいCO除去技術”

  多田昌平, 菊地隆司 (Joint work)
  シーエムシー出版 2013
• 担持Ru触媒におけるRu粒子径と担体のCOメタン化選択性への影響

  多田昌平, 菊地隆司 (Joint work表面 50 6-7)
  2012/01

Presentations

• CO2 hydrogenation to olefins using bifunctional catalysts consisting of ZnZrOx and zeolite  [Invited]

  Shohei Tada

  The Fourteenth International Conference on the Science and Technology for Advanced Ceramics (STAC14)
• CO2 hydrogenation to olefins using bifunctional catalysts consisting of ZnZrOx and MOR-type zeolite  [Invited]

  Shohei Tada

  International symposium of Institute for Catalysis 2024 “Development of Catalyst Technology for Resource Recycling”  2024/10
• メタノールの再吸着に着目した二酸化炭素水素化触媒の開発  [Invited]

  Shohei Tada

  第134回触媒討論会  2024/09
• 二酸化炭素を原料とした有用物質合成を可能とする 固体触媒の開発  [Invited]

  Shohei Tada

  化学工学会 第55回秋季大会 ST-23[部会横断シンポジウム] 物質・エネルギーの革新的「変換・貯蔵・利用」技術と化学工学の貢献  2024/09
• 触媒前駆体構造に着目した二酸化炭素水素化によるメタノール合成用銅触媒の開発  [Invited]

  Shohei Tada

  日本金属学会シンポジウム カーボンニュートラル・水素社会実現に向けた触媒材料の研究・開発の最新動向  2023/11
• 二酸化炭素水素化による低級オレフィンのワンパス合成  [Invited]

  Shohei Tada

  第132回触媒討論会北の国触媒セッション  2023/09
• 二酸化炭素からの有用物質ワンパス合成  [Invited]

  Shohei Tada

  2022 年度触媒学会「水素の製造と利用に関するシンポジウム」  2022/11
• 火炎噴霧熱分解法を活用した新規固体触媒の開発とCO2 有価物変換への応用  [Invited]

  多田 昌平, 藤原 翔

  第11回jaci/gscシンポジウム  2022/06
• ゼロエミッション達成に向けた,メタノール合成固体触媒開発動向とビジネスチャンス  [Invited]

  多田昌平

  日本計画研究所 オンラインセミナー  2022/06
• 反応機構に立脚した,二酸化炭素水素化触媒の開発研究  [Invited]

  多田昌平

  令和４年度 科学技術分野の文部科学大臣表彰若手科学者賞 受賞記念講演会  2022/06
• 触媒前駆体構造に着目した,二酸化炭素水素化によるメタノール合成触媒の創製  [Invited]

  多田昌平

  石油学会 第64回年会／第70回研究発表会  2022/05
• CO2水素化によるメタノール合成触媒への非晶質材料の展開  [Invited]

  多田昌平

  一般社団法人燃料電池開発情報センター第29回 燃料電池シンポジウム  2022/05
• 二機能性触媒を用いたCO2の変換・オレフィン合成技術  [Invited]

  多田昌平

  技術情報協会 オンライン技術セミナー  2022/05
• 複合酸化物の物性に着目したCO2水素化触媒の開拓  [Invited]

  多田昌平

  化学工学会 第87年会  2022/03
• CO2水素化反応によるメタノール合成に特化した固体触媒の考え方  [Invited]

  多田昌平

  R&D支援センター セミナー  2022/02
• 二酸化炭素資源化技術への非晶質材料の展開  [Invited]

  多田昌平

  令和3年度茨城大学学長学術表彰  2022/01
• CO2 methanation over Ru/ZrO2 catalysts  [Not invited]

  Shohei Tada, Hironori Nagase, Rei Naito, Ryuji Kikuchi

  The 1st Symposium on Carbon Ultimate Utilization Technologies for the Global Environment  2021/12
• Bifunctional tandem catalysts for the one-pass synthesis of lower olefins via CO2 hydrogenation  [Invited]

  Shohei Tada

  30th Annual Saudi-Japan Symposium - 2021  2021/12
• CO2からメタノールを合成する固体触媒の展開  [Invited]

  多田昌平

  情報機構 セミナー  2021/12
• Design of Cu/ZrO2 catalysts specific to CO2-to-methanol hydrogenation  [Invited]

  Shohei Tada

  17th Taiwan-Japan Joint Symposium on Catalysis  2021/12
• Development of tandem catalysts for lower olefin synthesis via CO2 hydrogenation  [Not invited]

  Shohei Tada、Hiroka Kinoshita, Mina Okazaki, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki

  18th Japan-Korea Symposium on Catalysis (18JKSC)  2021/11
• ウイルス検出を目指した糖鎖固定化蛍光ポリマー粒子の開発  [Not invited]

  永塚 実稚、多田昌平、小林 芳男、尾形 慎、 山内 紀子

  化学工学第52回秋季大会  2021/09
• 高表面積なNi-Al系金属間化合物の化学合成とCO2活性化触媒反応への応用  [Not invited]

  小林 靖和、多田昌平、菊地 隆司

  化学工学第52回秋季大会  2021/09
• CO2水素化反応用タンデム型触媒を用いた低級オレフィン合成  [Not invited]

  多田昌平、 木下 泰嘉、伊與木 健太、山内 紀子、小林 芳男

  化学工学第52回秋季大会  2021/09
• 固体リン酸塩電解質を用いた中温作動型水蒸気電解セルの開発  [Not invited]

  菊地 隆司、藤原 直也、多田昌平

  化学工学第52回秋季大会  2021/09
• 一酸化炭素の水素化反応に用いるTi6Si7Ni16金属間化合物ナノ粒子担持ニッケル触媒の化学合成  [Not invited]

  小林 靖和、多田昌平、溝口 拓

  第128回触媒討論会  2021/09
• CO2水素化触媒を活用した有価物合成反応の展開  [Invited]

  多田昌平

  公益社団法人自動車技術会第9回大気環境技術・評価部門委員会  2021/09
• CO2水素化によるメタノール合成に特化した銅触媒の開発  [Invited]

  多田昌平

  日本化学会関東支部講演会「カーボンニュートラル社会実現に向けた科学技術の最新動向」  2021/09
• 反応機構に立脚した新規メタノール合成触媒の開発  [Invited]

  多田昌平

  大阪市立大学 人工光合成研究センター 第１回若手研究者研究発表会  2021/08
• CO2からメタノールへの変換効率を高める触媒の新開発  [Invited]

  多田昌平

  CMCリサーチウェビナー  2021/08
• Promotion of Hydrogen Oxidation and Methane Dry Reforming over Ni-SDC Anode by Basic Oxide Additives  [Not invited]

  R. Kikuchi, T. Mishina, T. Kayamori, N. Fujiwara, S. Tada

  17th International Symposium on Solid Oxide Fuel Cells (SOFC-XVII)  2021/07
• 触媒前駆体中の銅配位構造に着目した二酸化炭素水素化触媒の開発  [Invited]

  多田昌平

  第5回SPring-8先端放射光技術による化学イノベーション研究会／第62回SPring-8先端利用技術ワークショップ  2021/07
• CO2水素化反応によるメタノール合成に特化した金属酸化物触媒の開発  [Not invited]

  多田昌平、落合和、木下泰嘉、伊與木健太、山内紀子、小林芳男

  石油学会第63年会  2021/05
• Cu-based catalyst precursor for CO2-to-methanol hydrogenation  [Invited]

  Shohei Tada

  The 8th Workshop on Next-Generation Utilization of Natural Gas  2021/03
• 二酸化炭素資源化技術への非晶質材料の展開  [Invited]

  多田昌平

  化学工学会第86年会
• 二酸化炭素資源化技術への非晶質材料の展開  [Invited]

  多田昌平

  化学工学会第86年会  2021/03  オンライン＋東京  化学工学会
  
• 温度応答性poly(NIPAM-MMA)粒子の水相合成  [Not invited]

  山内紀子、藤岡泰河、永塚実稚、多田昌平、福元博基、小林芳男

  化学工学会第86年会  2021/03  オンライン＋東京  化学工学会
  
• CO2メタン化反応用Ni/CeO2触媒の反応場の検討  [Not invited]

  多田昌平、永瀬寛典、菊地隆司

  化学工学会第86年会  2021/03  オンライン＋東京  化学工学会
  
• 固体酸化物型電解セルを用いたメタンの酸化的カップリング反応  [Not invited]

  菊地隆司、兒玉周、藤原直也、多田昌平

  第127回触媒討論会  2021/03  オンライン  触媒学会
  
• CO2水素化反応用タンデム型触媒による低級オレフィン合成  [Not invited]

  木下泰嘉、落合和、伊與木健太、山内紀子、小林芳男、多田昌平

  第23回化学工学会学生発表会  2021/03  オンライン  化学工学会
  
• X線CT造影のためのAu-ポリ乳酸グリコール酸共重合体ナノ粒子の合成  [Not invited]

  野代陽介、多田昌平、小林芳男、山内紀子

  第23回化学工学会学生発表会  2021/03  オンライン  化学工学会
  
• CO2水素化からのメタノール合成用La添加ZnZrOx触媒の開発  [Not invited]

  落合和、木下泰嘉、伊與木健太、山内紀子、小林芳男、多田昌平

  第23回化学工学会学生発表会  2021/03  オンライン  化学工学会
  
• 化石資源に頼らない持続可能な社会の実現のために  [Invited]

  多田昌平

  県民大学講座「豊かな生活環境を求めて」  2020/12
• Mg1-xCuxAl2O4を用いたCuナノ粒子還元析出の理解  [Not invited]

  多田昌平、大塚文人、菊地隆司

  第31回 日本化学会関東支部 茨城地区研究交流会  2020/12  茨城  日本化学会関東支部
  
• CO2水素化反応によるメタノール合成反応機構の理解とそれに立脚した触媒開発  [Invited]

  多田昌平

  公益財団法人地球環境産業技術研究機構 無機膜研究センター 産業化戦略協議会 第１5 回セミナー  2020/12
• Fe/BZY-RuO2 触媒とリン酸二水素セシウム電解質による中温域におけるアンモニア合成  [Not invited]

  袁瑤、多田昌平、菊地隆司

  第41回水素エネルギー協会大会  2020/11
• CO2-to-methanol hydrogenation catalyst by focusing on coordination structure of Cu species  [Not invited]

  S. Tada, F. Otsuka, R. Kikuchi

  第50回石油・石油化学討論会  2020/11
• ペロブスカイト型LaM0.95Rh0.05O3 (M: Cr, Co, Fe) 触媒を用いたメタン部分酸化反応  [Not invited]

  多田昌平、小野貴正、菊地隆司

  化学工学会 第51回秋季大会  2020/09
• CH4部分酸化反応用La系ペロブスカイト型酸化物触媒の開発  [Not invited]

  多田昌平、小野貴正、菊地隆司

  第126階触媒討論会  2020/09
• CO2水素化によるメタン合成のための担持Ru触媒の開発  [Not invited]

  菊地隆司、永瀬寛典、内藤玲、多田昌平

  第126階触媒討論会  2020/09
• 火炎噴霧熱分解法によるZrO2担持Cu粒子の微粒化と高担持量化  [Not invited]

  藤原翔、多田昌平、佐々木斐呂

  第37回エアロゾル科学・技術研究討論会  2020/08  オンライン
• CO2水素化反応による水素キャリア合成のための担持Ru触媒の開発  [Not invited]

  菊地隆司、永瀬寛典、内藤玲、多田昌平

  第125回触媒討論会（中止）  2020/03  東京
• 改質用La系ペロブスカイト触媒における再生挙動  [Not invited]

  多田昌平、小野貴正、菊地隆司

  第125回触媒討論会（中止）  2020/03  東京
• ソルボサーマル法によるZnO-ZrO2固溶体球状粒子の合成  [Not invited]

  五十嵐瞳、杉山歩哉、岩本伸司、多田昌平、菊地隆司

  第125回触媒討論会（中止）  2020/03  東京
• ペロブスカイト型LaM0.95Rh0.05O3(M:Cr,Co,Fe)触媒を用いたメタン部分酸化反応  [Not invited]

  多田昌平、小野貴正、菊地隆司

  化学工学会 第85年会（中止）  2020/03  大阪
• 固体リン酸塩電解質を用いた中温作動型電解セルの開発  [Not invited]

  藤原直也、永瀬寛典、多田昌平、菊地隆司

  化学工学会 第85年会（中止）  2020/03  大阪
• 固体酸化物型電解セルを用いたメタンの酸化的カップリング反応  [Not invited]

  兒玉周、藤原直也、多田昌平、菊地隆司

  化学工学会 第85年会（中止）  2020/03  大阪
• フロー電極を用いたリチウム回収に関する研究  [Not invited]

  西村拓、秋山大樹、藤原直也、多田昌平、菊地隆司

  化学工学会 第85年会（中止）  2020/03  大阪
• Ti-Fe複合酸化物前駆体の低温還元によるTiFeナノ粒子の化学的合成と水素吸蔵特性  [Not invited]

  山口峻太、山岡頌平、花田信子、小林靖和、多田昌平、菊地隆司

  第22回化学工学会学生発表会（東京大会）（中止）  2020/03  東京
• CO2水素化によるメタノール合成に特化した触媒の創製  [Invited]

  多田 昌平

  水素エネルギー協会 第161回定例研究会  2020/01
• Direct dimethyl ether synthesis from CO2 hydrogenation over Cu/ZrO2 and zeolite mixed catalyst  [Not invited]

  Shiori Nakajima, Kazumasa Oshima, Shohei Tada, Ryuji Kikuchi, Minoru Sohmiya, Shigeo Satokawa

  GREEN2019  2019/12  Taipei
• ゼオライトと銅系触媒の混合触媒を用いた二酸化炭素からのDME一段合成  [Not invited]

  中嶋栞理、宗宮穣、大島一真、里川重夫、多田昌平、菊地隆司

  第39回水素エネルギー協会大会  2019/12  東京
• Ti-Fe複合酸化物前駆体の低温還元による水素吸蔵合金TiFeナノ粒子の化学的合成  [Not invited]

  小林靖和、山岡頌平、山口峻太、花田信子、多田昌平、菊地隆司

  第39回水素エネルギー協会大会  2019/12  東京
• 中温作動型電解セルを用いたCO2還元反応  [Not invited]

  藤原直也、多田昌平、小林靖和、大山茂生、菊地隆司

  第49回石油・石油化学討論会  2019/10  山形
• 中温作動型電解セルを用いたエタンの部分酸化反応  [Not invited]

  本多勇介、藤原直也、多田昌平、小林靖和、大山茂生、菊地隆司

  第49回石油・石油化学討論会  2019/10  山形
• Dry reforming of methane over Ni catalysts supported on LaGaO3-based oxides  [Not invited]

  Ryuji Kikuchi, Jihan Lee, Shohei Tada

  The Fifth International Symposium on Innovative Materials and Processes in Energy Systems (IMPRES2019)  2019/10  Kanazawa Chamber of Commerce and Industry
• CO2からのメタノール合成に特化した触媒の開発  [Invited]

  多田昌平

  化学工学会第50回秋季大会  2018/09
• CO2水素化によるメタノール合成触媒の新たな展開  [Invited]

  多田昌平, 里川重夫

  日本エネルギー学会 天然ガス部会 科学・反応システム分科会シンポジウム 二酸化炭素の再資源化  2017/10

Teaching Experience

化学I化学I Hokkaido University
応用化学実験IV応用化学実験IV Hokkaido University
英語演習英語演習 Hokkaido University
化学英語化学英語 Hokkaido University
物理化学物理化学 Ibaraki University
物質科学基礎実験I物質科学基礎実験I Ibaraki University
応用化学演習I応用化学演習I Ibaraki University
応用化学実験I応用化学実験I Ibaraki University
触媒化学特論触媒化学特論 Ibaraki University
化学工学実験化学工学実験 The University of Tokyo

Association Memberships

• THE JAPAN PETROLEUM INSTITUTE   CATALYSIS SOCIETY OF JAPAN   THE SOCIETY OF CHEMICAL ENGINEERS, JAPAN   日本固体イオニクス学会   日本化学会   水素エネルギー協会   

Research Projects

• 二酸化炭素からのエタノール合成を可能とする多機能触媒の開発

  日本学術振興会：科学研究費助成事業

  Date (from‐to) : 2024/04 -2027/03 

  Author : 多田 昌平
• 多機能性触媒を用いたバイオガスからの含酸素化合物合成

  独立行政法人環境再生保全機構：環境研究総合推進費

  Date (from‐to) : 2024/04 -2027/03 

  Author : 多田昌平, 城塚達也
• 貴金属触媒を用いたCO2からのメタノール合成における副反応抑制メカニズムの解明

  一般財団法人 田中貴金属記念財団：貴金属に関わる研究助成金

  Date (from‐to) : 2024/04 -2025/03 

  Author : 多田昌平
• CO2からメタノールを低温域で合成する固体触媒の開発

  北海道ガス：大学研究支援制度

  Date (from‐to) : 2023/04 -2024/03 

  Author : 多田昌平
• バイオガス中二酸化炭素の有効利用技術開発

  NEDO：NEDO

  Date (from‐to) : 2022/05 -2024/03
• 非晶質金属酸化物の表面特性に着目した新規CO2メタン化反応場の開拓

  公益財団法人東電記念財団：公益財団法人東電記念財団 研究助成金

  Date (from‐to) : 2022/04 -2024/03
• Molecular Science of Methanol Synthesis by CO2 Hydrogenation using Zirconia-Based Catalysts

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

  Date (from‐to) : 2021/04 -2024/03 

  Author : 城塚 達也, 多田 昌平

   

  本研究の目的は分子科学の立場から実験家（研究分担者：茨城大学多田昌平助教）と連携してジルコニア系触媒を用いたCO2水素化によるメタノール合成の触媒反応機構を第一原理計算により解明することである。本研究では、①ヒドロキシ基②表面アモルファス性③金属クラスターの3要素に着目することで吸着から始まる一連の化学反応の理解に、理論と実験の両面から取り組む。得られた知見を基に、表面構造・結晶性・クラスター依存性などの分子科学を探求し、より高性能な触媒開発を目指す。2021年度には①ヒドロキシ基②表面アモルファス性に着手し以下のような成果が得られた。 ①ヒドロキシ基：正方晶・単斜晶系ジルコニア触媒結晶表面やその亜鉛との固溶体表面と水との界面を作成し分子動力学シミュレーションを実施した。シミュレーションの結果得られたヒドロキシ基を実験と比較すると比較的良い一致を示した。ヒドロキシ化された表面と結晶表面におけるCO2水素化の反応物と生成物の吸着は大きな変化が見られなかったため、今後は反応中間体の吸着や反応メカニズムも含めて検討を進める。 ②表面アモルファス性：アニーリングによりバルクジルコニアのアモルファス構造を作成した。動径分布関数などを実験と比較したところ良い一致を示したため、アモルファス表面を作成し、CO2水素化の反応物と生成物の吸着を調べたところアモルファス構造により吸着が弱まることが確認され、実験で観測されたアモルファスジルコニアによるメタノール選択性の向上を説明することに成功した。 ③金属クラスター：CO2水素化を目指したスピネル型酸化物（MgAl2O4）前駆体を水素化することによる銅ナノ粒子生成メカニズムをDFT計算により解明した。 上記のジルコニア系触媒に加えて、アモルファスシリカなどでも同様の検討を行った。
• One-pass Catalytic Process to Obtain Useful Substances from CO2 and H2

  NEDO：Feasibility Study Program Uncharted territory challenge 2050

  Date (from‐to) : 2019/10 -2024/03
• 非晶質材料の表面物性に着目した二酸化炭素水素化触媒の開拓

  公益財団法人岩谷直治記念財団 岩谷科学技術研究助成金

  Date (from‐to) : 2022/04 -2023/03
• 低温メタノール合成を志向した新規メタノール合成触媒の開発

  公益財団法人スズキ財団 令和3年度科学技術研究（若手）助成金

  Date (from‐to) : 2022/04 -2023/03
• 希土類酸化物の物性に着目したCO2水素化触媒の開拓

  公益財団法人 ENEOS東燃ゼネラル研究奨励・奨学会：ENEOS東燃ゼネラル研究奨励・奨学会 研究助成

  Date (from‐to) : 2021/04 -2023/03
• 有機高分子－プロトン伝導性固体酸塩複合体電解質を用いた中温域電解プロセスの確立

  小笠原敏晶記念財団：小笠原敏晶記念財団 2020年度一般研究助成

  Date (from‐to) : 2021/04 -2023/03
• 燃焼合成法による二元金属酸化物触媒の開拓：CO2水素化反応への応用

  池谷科学技術振興財団：2021年度 池谷科学技術振興財団単年度研究助成

  Date (from‐to) : 2021/04 -2022/03
• ゼロエミッション社会実現に向けた革新的二酸化炭素変換触媒の開発研究

  JKA：2021年度補助事業

  Date (from‐to) : 2021/04 -2022/03
• 実用化を志向した燃焼合成法によるCO2からのメタノール合成に特化した触媒の創製

  日本学術振興会：科研費 基盤研究(C)

  Date (from‐to) : 2018/04 -2021/03 

  Author : 多田昌平
• 固体酸化物形燃料電池の排熱利用にむけたドライ改質触媒の低温作動化

  公益財団法人 熊谷科学技術振興財団：熊谷研究助成表彰

  Date (from‐to) : 2019/04 -2020/03 

  Author : 多田昌平
• Cu種の配位構造に着目したCO2からのメタノール合成触媒の開発

  公益社団法人 石油学会：研究助成

  Date (from‐to) : 2019/04 -2020/03 

  Author : 多田昌平
• Development of metal phosphides as a novel anode material and application to intermediate-temperature fuel cells

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2016/04 -2019/03 

  Author : Kikuchi Ryuji, TADA Shohei, QING Geletu

   

  Metal phosphides are active for H-H bond dissociation, thermally and chemically stable, and electronically conductive comparable to metals. Because of these features, metal phosphides are expected as electrode materials in fuel cells. In this study, metal phosphides such as Ni2P, CoP, FeP, WP, and MoP have been investigated as anode catalysts for intermediate temperature fuel cells, and power generation characteristics were evaluated at 220℃ as H2-O2 fuel cells. The anode performance is in the following order: MoP > WP > FeP > CoP > Ni2P. In addition, MoP and WP exhibited higher current density per electrochemical surface area than commercial Pt/C. Carbon materials such as carbon black or carbon nano-fiber mixed in the anode were found effective to reduce polarization resistances derived from the anodic reaction and gas diffusion in the anode, leading to better power generation performance. In addition, CO tolerance of MoP and WP anodes was proved by using 1%CO/H2 gas.
• 表面化学的手法に基づいた担持二元金属ナノ粒子の調製とその触媒能の検討

  日本学術振興会：科研費 若手研究(B)

  Date (from‐to) : 2016/04 -2018/03 

  Author : 多田昌平
• 二酸化炭素水素化反応によるメタノール合成反応機構解明およびそれに立脚した触媒開発

  日本学術振興会：特別研究員 PD

  Date (from‐to) : 2015/04 -2018/03 

  Author : 多田昌平
• 水素エネルギー社会実現を目指したCOxメタン化触媒の開発

  日本学術振興会：特別研究員 DC2

  Date (from‐to) : 2013/04 -2015/03 

  Author : 多田昌平
• 第11回欧州触媒会議への参加

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  Date (from‐to) : 2013/09 -2013/09 

  Author : 多田昌平

Media Coverage

• 火炎噴霧熱分解法を活用した新規固体触媒の開発とCO2有価物変換への応用

  Date : 2022/06/14

  Writer: Other than myself

  Publisher, broadcasting station: 化学工業日報

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• 触媒化学でエネルギーキャリアの新たな製造技術の道を拓く

  Date : 2022/06

  Writer: Other than myself

  Publisher, broadcasting station: リバネス

  Pr
• CO2をオレフィンに変換、茨城大・東大が触媒 製造プロセス簡略化

  Date : 2021/10/01

  Writer: Myself

  Publisher, broadcasting station: 日刊工業新聞

  Program, newspaper magazine: 日刊工業新聞

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• 茨城大と東大、CO2からワンパスで低級オレフィン等の有用物質を合成する触媒を開発

  Date : 2021/09/30

  Writer: Myself

  Publisher, broadcasting station: 日本経済新聞

  Program, newspaper magazine: 日本経済新聞

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• 二酸化炭素からメタノールへの変換効率を高める触媒を茨城大などが開発

  Date : 2021/01/25

  Writer: Other than myself

  Publisher, broadcasting station: TECH+ powered by マイナビ

  Internet
• 銅の簡便な微細化でCO2からメタノールへの変換効率高める触媒を新開発

  Date : 2021/01/21

  Writer: Other than myself

  Publisher, broadcasting station: 茨城大学

  Internet