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Oxidation of noble metals in gamma-ray radiation environment

Research Project

Project/Area Number 25420744
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Composite materials/Surface and interface engineering
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

YAMAMOTO SHUNYA  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究センター, 研究主幹 (70354941)

Co-Investigator(Kenkyū-buntansha) HAKODA TERUYUKI  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 研究主幹 (70354933)
Co-Investigator(Renkei-kenkyūsha) SHMADA AKIHIKO  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 技術員 (50354931)
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsガンマ線 / 貴金属 / 酸化物 / 薄膜 / ガスセンサー / 触媒 / 白金 / パラジウム / 金
Outline of Final Research Achievements

We investigated the influence of γ-ray radiation on noble metal films to obtain new knowledge about catalysis that can be used in a γ-ray radiation environment for hydrogen gas sensors. The epitaxial films of the noble metals (Ru, Rh, Pd, Ag, Ir, Pt, and Au) were prepared by sputtering deposition. The thin films were irradiated with 60Co γ-ray (~5 MGy) in air. We found that oxidation of Pd and Ag epitaxial films occurred with γ-ray radiation more than 1 MGy. The results suggested that oxidation of Pd and Ag films was related to nitric acid in air produced by 60Co γ-ray radiation. In contrast, oxidation of Pt, Au, Rh, Ru, and Ir epitaxial films by γ-ray irradiation could not be confirmed. Thus, these noble metals are possible to use in catalysis in a γ-ray radiation environment.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (8 results)

All 2016 2015 2014

All Journal Article (3 results) (of which Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (5 results) (of which Invited: 1 results)

  • [Journal Article] Gasochromic Properties of WO3 Films Prepared by Reactive Sputtering Deposition2016

    • Author(s)
      S. Yamamoto, T. Hakoda, A. Miyashita, M. Yoshikawa
    • Journal Title

      JAEA-Review

      Volume: 2015-022 Pages: 117-117

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Structural and gasochromic properties of WO3 films prepared by reactive sputtering deposition2015

    • Author(s)
      S. Yamamoto, T. Hakoda, A. Miyashita, M. Yoshikawa
    • Journal Title

      Mater. Res. Express

      Volume: 2 Issue: 2 Pages: 026401-026401

    • DOI

      10.1088/2053-1591/2/2/026401

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Characterization of Pt and Pd epitaxial films on sapphire substrates by RBS/channeling2015

    • Author(s)
      S. Yamamoto, T. Hakoda, M. Yoshikawa
    • Journal Title

      JAEA-Review

      Volume: 2014-050 Pages: 129-129

    • Related Report
      2014 Research-status Report
  • [Presentation] 空気中のγ線照射下における貴金属の酸化物形成2016

    • Author(s)
      山本春也、宮下敦巳、島田明彦、箱田照幸
    • Organizer
      2016年日本金属学会春期大会
    • Place of Presentation
      東京理科大学葛飾キャンパス(東京都葛飾区)
    • Year and Date
      2016-03-23
    • Related Report
      2015 Annual Research Report
  • [Presentation] RBS/channeling analysis of epitaxial Pt and Pd films irradiated with 60Co γ-ray2015

    • Author(s)
      S. Yamamoto, A. Shimada, A. Miyashita,T. Hakoda
    • Organizer
      The 25th Annual Meeting of The Material Research Society of Japan
    • Place of Presentation
      横浜市開港記念会館(神奈川県横浜市)
    • Year and Date
      2015-12-08
    • Related Report
      2015 Annual Research Report
  • [Presentation] 電子線及びガンマ線を利用してセリア薄膜上に析出させた白金ナノ粒子2015

    • Author(s)
      山本春也、杉本雅樹、宮下敦巳、箱田照幸、八巻徹也、森 利之
    • Organizer
      第25回日本MRS年次大会
    • Place of Presentation
      横浜市開港記念会館(神奈川県横浜市)
    • Year and Date
      2015-12-08
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] スパッタリング法で作製した三酸化タングステン膜のガスクロミック特性2015

    • Author(s)
      山本春也、箱田照幸、宮下敦巳、吉川正人
    • Organizer
      第10回高崎量子応用研究シンポジウム
    • Place of Presentation
      高崎量子応用研究所(群馬県高崎市)
    • Year and Date
      2015-10-08
    • Related Report
      2015 Annual Research Report
  • [Presentation] サファイア基板上に形成した白金及びパラジウムのエピタキシャル膜のRBS/チャネリングによる評価2014

    • Author(s)
      山本 春也; 箱田 照幸; 宮下 敦巳; 吉川 正人
    • Organizer
      第9回高崎量子応用研究シンポジウム
    • Place of Presentation
      高崎シティギャラリー(高崎)
    • Year and Date
      2014-10-09 – 2014-10-10
    • Related Report
      2014 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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