Hydrogen isotope effects upon operation of a polymer electrolyte membrane fuel cell
| Project/Area Number |
15K06670
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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 |
Nuclear engineering
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| Research Institution | Sophia University |
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Principal Investigator |
OI Takao 上智大学, 理工学部, 教授 (90168849)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 燃料電池 / 水素同位体効果 / 酸素同位体効果 / 換算分配関数比 / 分子軌道計算 / 蒸気圧同位体効果 / 分離係数 / 同位体分離係数 |
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| Outline of Final Research Achievements |
Hydrogen and oxygen isotope effects on operation of a polymer electrolyte membrane fuel cell were observed. The H isotope separation factor, SH, between the oxidized and non-oxidized H was ca. 3, which agreed with our previous results. No temperature dependence of SH was observed. O isotope effects were observed quantitatively for the first time. The O isotope separation factor, SO, was mostly between 1,023 and 1,031. No temperature dependence of SO was observed.
The reduced partition function ratios, RPFRs, of H and O species adsorbed on a platinum catalyst surface were theoretically evaluated using the Pt19 cluster. Interaction between two adjacent H-Pt bonds was found to enhance the mutual RPFRs. It was shown a H species is needed for dissociation of an O molecule on the Pt surface. The vapor pressure isotope effects, VPIEs, in fluoroform were analyzed. Temperature dependent H-F interactions of neighboring molecules were required to explain the temperature dependence of the VPIEs.
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Report
(4 results)
Research Products
(4 results)
