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Development of hydride ion conductor using surface and/or grain boundaries

Research Project

Project/Area Number 18K18957
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionKumamoto University

Principal Investigator

Ida Shintaro  熊本大学, 産業ナノマテリアル研究所, 教授 (70404324)

Project Period (FY) 2018-06-29 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsヒドリド / ナノシート / 同位体センサー / ロジウム / 粒界 / 表面 / プロトン / 粒界・表面
Outline of Final Research Achievements

Rhodium-doped titanium oxide layer compounds was synthesized as a hydride ion conductor in which the surface and grain boundaries were involved. We investigated whether the hydride species adsorbed on the rhodium-doped site exhibited surface hydride conduction. The conduction characteristics were evaluated in hydrogen or deuterium. The current-voltage characteristics and impedance characteristics changed when the H2 gas was changed to D2 gas, indicating that the ionic species involved in hydrogen are conducting. However, the conductivity was higher in the atmosphere in deuterium, which has a heavier mass, compared to the atmosphere in H2. These results indicated that new hydride conduction different from the normal hydride conduction mechanism may occur in the rhodium-doped titanium oxide layered body.

Academic Significance and Societal Importance of the Research Achievements

水素原子に1つの電子が付加したヒドリドは、その酸化還元電位が水素標準電極に対して-2.25Vとかなり卑な電位を持つため、単独のヒドリドと酸素で燃料電池が構築できれば、従来の水素燃料電池よりも大きなの起電力が得られる可能性がある。しかしながら、この材料は空気中で不安定であり、電池や燃料電池応用にはさらなる開発が必要であるとされている。また、ヒドリド伝導を示す材料は限られており、新しい設計コンセプトをもった材料開発が求められていた。本研究成果は、表面・粒界という切り口でヒドリドイオン伝導体を提案し、従来にはない伝導機構のヒドリドイオン伝導を示す可能性がある材料を創製できたことは学術的価値は高い。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (6 results)

All 2021 2020 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results)

  • [Journal Article] Water splitting using a photocatalyst with single-atom reaction sites2020

    • Author(s)
      Hsu, C.-W., Awaya, K., Tsushida, M., Miyano, T., Koinuma, M., Ida, S.
    • Journal Title

      Journal of Physical Chemistry C

      Volume: 124 Issue: 38 Pages: 20846-20853

    • DOI

      10.1021/acs.jpcc.0c03132

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Rh-doped TiO2を用いた表面・粒界ヒドリド伝導の探索2021

    • Author(s)
      浦川 葵佑、鯉沼 陸央、伊田 進太郎
    • Organizer
      公益社団法人日本セラミックス協会 2021年年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Development of nano-structured catalyst using oxide nanosheets2020

    • Author(s)
      Shintaro Ida
    • Organizer
      第50回石油・石油化学討論会)(オンライン)
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Rh-doped TiO2を用いた表面・粒界ヒドリド伝導の探索2019

    • Author(s)
      小金丸由紀、鯉沼陸央、伊田進太郎
    • Organizer
      第56回 化学関連支部合同九州大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 二次元材料を用いた機能性ナノシートデバイスの開発2019

    • Author(s)
      伊田進太郎
    • Organizer
      粉体粉末冶金秋季大会 秋季講演会 2019年10月22日
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Oxide nanosheet photocatalysts for water splitting2018

    • Author(s)
      Shintaro Ida
    • Organizer
      Science and Applications of Thin Films, Conference & Exhibition (SATF 2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2018-07-25   Modified: 2022-03-04  

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