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Development of High Corrosion Resistant Fuel Cell Catalyst Surface Based on Understanding Corrosion Mechanism of Platinum Alloy

Research Project

Project/Area Number 20K15059
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 26050:Material processing and microstructure control-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

OOI AZUSA  東京工業大学, 物質理工学院, 助教 (00803876)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords固体高分子形燃料電池 / 白金合金触媒 / 触媒耐久性 / チャンネルフローマルチ電極法 / 耐久性 / 腐食
Outline of Research at the Start

本研究は,固体高分子形燃料電池の正極材料としての利用が期待される,白金合金触媒の腐食劣化機構の解明を目的としている.それは,白金合金触媒の長寿命化には,その腐食劣化機構に基づく触媒表面の制御が極めて重要と考えられるからである.したがって,白金合金触媒の腐食劣化機構におよぼす材料因子(合金組成・合金元素など)の影響を調査し,白金使用量を低減した低コスト・長寿命な白金合金触媒の開発を目指す.

Outline of Final Research Achievements

This study aims to elucidate the dissolution and degradation mechanisms of platinum (Pt) alloy catalysts used as cathode catalysts in polymer electrolyte fuel cells (PEFCs). To this end, an in-situ and simultaneous quantitative detection method for dissolved Pt and alloying elements under PEFC operating conditions has been successfully developed. The method was applied to Pt-copper (Cu) alloy catalysts, and it was found that the dissolution mechanism differs depending on the alloy composition. In particular, a large amount of Cu dissolved from the alloy catalyst when the amount of Cu added to the alloy increased up to 75 at%. As a result, the durability of the catalyst was found to be significantly reduced.

Academic Significance and Societal Importance of the Research Achievements

本研究では,PEFC稼働環境下におけるPt合金触媒からの極微量な溶解量を,同時かつ定量評価可能な測定系の構築に成功した.したがって,Pt合金触媒の詳細な溶解劣化機構解明という学術的な見地から,高耐久性を有する触媒設計指針を検討できる点に価値がある.また,溶解劣化機構の解明に基づき,高耐久性を長期にわたり維持できるPt合金触媒の組成が提案できれば,PEFCを安価に提供できることに繋がるため,カーボンニュートラルへの貢献も可能である.

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (5 results)

All 2022 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results)

  • [Journal Article] Channel-flow triple electrode for simultaneous in situ detection of platinum and copper dissolution2022

    • Author(s)
      Ooi Azusa、Tada Eiji
    • Journal Title

      Journal of Electroanalytical Chemistry

      Volume: 904 Pages: 115906-115906

    • DOI

      10.1016/j.jelechem.2021.115906

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] オンラインICP-MS測定のセル構造が検出に及ぼす影響の評価2021

    • Author(s)
      神田都羽, 大井梓, 多田英司
    • Organizer
      第68回材料と環境討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 電位サイクル下におけるPt-Co合金の溶解挙動に及ぼす塩化物イオンの影響2021

    • Author(s)
      西健介, 大井梓, 多田英司
    • Organizer
      2021年電気化学秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 硫酸溶液中における白金パラジウム合金の腐食挙動2021

    • Author(s)
      大井梓, 後藤愛生, 多田英司, 西方篤
    • Organizer
      電気化学会第88回大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 硫酸溶液中における白金パラジウム合金の腐食挙動2020

    • Author(s)
      大井 梓,後藤愛生,多田英司,西方 篤
    • Organizer
      電気化学会第88回大会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2023-01-30  

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