| Project/Area Number |
26550060
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental engineering and reduction of environmental burden
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
Umeda Minoru 長岡技術科学大学, 工学(系)研究科(研究院), 教授 (20323066)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 環境負荷低減 / クローズド化 / 燃料電池技術応用 |
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| Outline of Final Research Achievements |
Electrochemical Pt dissolution was found to be accelerated by the presence of H2O2 in a 0.5 M H2SO4 solution. A faster Pt dissolution was examined by adding a small amount of metal ion, resulted in a combination of H2O2 and Fe2+ showed the fastest dissolution. This Pt dissolution was investigated using an electrochemical quartz crystal microbalance (EQCM). The EQCM data in the H2O2-containing H2SO4 with and without Fe2+ showed that a remarkable Pt dissolution occurred during the cathodic potential step of 1.36 / 0.36 V vs. RHE from the 4th cycle, which is further enhanced by the presence of Fe2+. The mass gains and mass losses observed up to the 3rd cycle were also more significant in the presence of Fe2+, suggesting that the roughness of the Pt electrode surface remarkably increased. This phenomenon may be caused by the enhanced O2 generation due to the significant decomposition of H2O2. As a result, Pt oxidants inducing the cathodic Pt dissolution occur from the rearranged Pt atoms.
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