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Papers 【 display / non-display 】

• Fe, N-Doped SrTiO3 Synthesized Using Pyrazine Carboxylic Acid-Metal Complexes: Application as an Oxygen Reduction Catalyst for Polymer Electrolyte Fuel Cell Cathodes in Acidic Media

  Takeuchi Yuu, Matsuzawa Koichi, Nagai Takaaki, Ikegami Kaoru, Kuroda Yoshiyuki, Monden Ryuji, Ishih … Show more authors

  Bulletin of the Chemical Society of Japan   96 ( 2 )   175 - 177   2023.2  [Reviewed]

  DOI Web of Science CiNii Research

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  Language：English   Publishing type：Research paper (scientific journal)   Publisher：公益社団法人 日本化学会   Joint Work  

  <p>Fe, N-doped SrTiO₃ was successfully synthesized using pyrazine carboxylic acid-metal complexes as the starting materials and exhibited high onset potential of 0.8 V vs. RHE for the oxygen reduction reaction because of the formation of high-quality active sites by Fe and N doping, and electron conduction paths by carbon nanotubes.</p>

• Effect of Organic Ligands in Precursors on Oxygen Reduction Activity of Titanium-oxide Based Catalysts as Non-Platinum Cathodes for PEFCs

  Yuu Takeuchi, Koichi Matsuzawa, Keita Watanabe, Takaaki Nagai, Ryuji Monden, Akimitsu Ishihara

  22 ( 3 )   80 - 84   2023.1  [Reviewed]

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  Language：Japanese   Publishing type：Research paper (scientific journal)   Single Work  

• Effect of Iron Doping on Oxygen Reduction Activity of Zirconium Oxides Containing Carbon and Nitrogen Using Pyrazine Carboxylic Acid as Platinum Alternative Cathodes for PEFC

  K. Watanabe, K. Matsuzawa, Y. Takeuchi, K. Ikegami, Y. Ohgi, T. Nagai, R. Monden, and A. Ishihara

  ECS Transactions   109 ( 9 )   389 - 399   2022.10  [Reviewed]

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  Language：English   Publishing type：Research paper (international conference proceedings)   Single Work  

• Analysis Method for Rotating Disk Voltammograms of Electrocatalytic Reaction —Oxygen Reduction Reaction—

  YOKOYAMA Yuko, NAGAI Takaaki, ISHIHARA Akimitsu, YAMAMOTO Masahiro, MIYAZAKI Kohei, ABE Takeshi, KA … Show more authors

  電気化学および工業物理化学   90 ( 10 )   103003 - 103003   2022.9  [Reviewed]

  DOI Web of Science CiNii Research

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  Language：English   Publishing type：Research paper (scientific journal)   Publisher：公益社団法人　電気化学会   Joint Work  

  <p>Rotating disk voltammograms of electrocatalytic reactions were often analyzed on a model of the totally irreversible reaction. The problem with the conventional method is pointed out, and the validity of an analysis method on a model of the electrocatalytic reaction is demonstrated for oxygen-reduction reaction (ORR) as an example. Rotating disk voltammograms of ORRs sometimes show gradual change in the limiting current region called residual slope. The phenomenon has been explained on a random distribution model in which the catalytic sites communicate in long-range electron transfer with the electronic conductors that locate at distances (<i>z</i>), and are uniformly distributed with respect to <i>z</i>. Observed data of an ORR were well reproduced by non-linear least squares analysis on the random distribution model. The result of the analysis is briefly discussed.</p>

• Enhancement of Oxygen Reduction Activity of Fe-added Zirconium Oxide Electrocatalysts without Conductive Supports in Sulfuric Acid

  Takeuchi Yuu, Watanabe Keita, Matsuzawa Koichi, Nagai Takaaki, Ikegami Kaoru, Monden Ryuji, Ishihar … Show more authors

  Chemistry Letters   51 ( 9 )   927 - 931   2022.9  [Reviewed]

  DOI Web of Science CiNii Research

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  Language：English   Publishing type：Research paper (scientific journal)   Publisher：公益社団法人 日本化学会   Joint Work  

  <p>Fe-added zirconium oxide electrocatalyst was synthesized using pyrazine carboxylic acid for catalyzing oxygen reduction reactions (ORR) in acidic media. The optimization of the Fe-additive ratio led to the highest onset potential of 0.917 V for ORR at −10 mA g_cat⁻¹ compared to that of previous studies. The high ORR activity was due to the formation of high-quality active sites with Fe addition in monoclinic ZrO₂ and a suitable electron supply path created through carbon deposited using a pyrazine carboxylic acid complex.</p>

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Review Papers 【 display / non-display 】

Review Papers 【 display / non-display 】

• 啓蒙普及の事例ー東京タワー・キッズ環境科学博士

  永井崇昭, 和田徹也

  燃料電池   17 ( 3 )   42 - 45   2018.1

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  Language：Japanese   Publishing type：Meeting report   Publisher：燃料電池開発情報センター   Joint Work  

• 横浜国立大学グリーン水素研究センターの活動紹介と社会貢献

  太田健一郎, 石原顕光, 永井崇昭

  JETI   66 ( 1 )   121 - 125   2018.1

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  Language：Japanese   Publishing type：Rapid communication, short report, research note, etc. (bulletin of university, research institution)   Publisher：株式会社日本出版制作センター   Joint Work