2015 Fiscal Year Final Research Report
Analyses of fuel cell reactions at Pt-based alloy single-crystal electrodes
Project/Area Number |
25410007
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Physical chemistry
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Research Institution | University of Yamanashi |
Principal Investigator |
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Keywords | 燃料電池 / 酸素還元活性 / 合金単結晶 / 回転ディスク電極 / Ptスキン層 |
Outline of Final Research Achievements |
The use of single-crystal electrodes is highly essential in order to understand high performance of Pt-based alloy electrocatalysts in polymer electrolyte fuel cells. We have established a facile, inexpensive technique to obtain Pt-based alloy single-crystals with desired alloy composition. The single-crystal surfaces were freshly prepared by heating in H2. It was demonstrated by low energy electron diffraction and low energy ion scattering that the heat treatment resulted in the formation of a Pt skin layer with a (1 x 1) surface structure on Pt-Co (hkl) surfaces. We examined the oxygen reduction activities of Pt-Co alloy (hkl) single-crystals by the rotating disk electrode (RDE) method. The kinetically-controlled current density jk at Pt-Co(111) electrodes was found to depend strongly on the Co content, and found to reach the maximum at x = 25 atom%, which is more than 25 times higher than that of Pt(111).
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Free Research Field |
電気化学
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