期刊
JOURNAL OF POWER SOURCES
卷 412, 期 -, 页码 282-286出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2018.11.026
关键词
Pt-Ru; Hydrogen oxidation reaction; Alkaline polymer electrolyte fuel cells; Magnetron sputtering; Volcano-shape relationship
资金
- National Natural Science Foundation of China [21872108, 21633008, 21573167, 91545205]
- Wuhan University Innovation Team [2042017kf0232]
- National Key Research and Development Program [2016YFB0101203]
- Fundamental Research Funds for the Central Universities [2014203020207]
The research and development of hydrogen oxidation reaction catalysts in alkaline media is a prerequisite for the commercialization of alkaline polymer electrolyte fuel cell. Pt-Ru bimetallic catalyst was found to be more active towards HOR than Pt in alkaline, but the composition-activity relationship of Pt-Ru alloys is still lacking. Herein, a series of Pt-Ru alloy planar electrodes with 14 different compositions were prepared in a high throughput fashion using an improved magnetron sputtering method. The atomic ratio of Pt was controlled from 6.7% to 99.7% within the samples. The corresponding electro-catalytic activities towards the HOR in alkaline were systematically measured by rotating disc electrode method. A volcano-shape relationship between the HOR exchange current density and the Ru atomic fraction was revealed, and maximum activity was observed at ca. 55% content of Ru. The enhancement in electro-catalytic activity is attributed to a reduction in the electronic charge density of Pt upon Ru doping.
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