Oxidation of noble metals in gamma-ray radiation environment
| Project/Area Number |
25420744
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Composite materials/Surface and interface engineering
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| Research Institution | Japan Atomic Energy Agency |
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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)
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| 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)
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| 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)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| 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)
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| 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 |
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| 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.
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Report
(4 results)
Research Products
(8 results)
