期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 114, 期 49, 页码 21417-21422出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp105779r
关键词
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资金
- National Natural Science Foundation of China [20573029, 50902041]
- Natural Science Foundation of Heilongjiang Province, of China [B200905]
- Harbin Science and Technology Bureau of China [2010RFXXG018, 2007RFQXG059]
- Youth Found of Harbin Normal University [KGB200812]
The promotion effect of Au in the catalyst of PdAu/C for formic acid oxidation is confirmed. As the ratio of Pd:Au in the catalyst is 3:1, the PdAu/C-3 catalyst has the largest electrochemical activity compared with that of catalysts with other ratios of Pd:Au. Tafel plots are employed to examine the charge-transfer kinetics of formic acid electrooxidation. The results suggest that the reaction kinetics is faster on PdAu/C than on Pd/C. The kinetic parameters such as the charge transfer parameter and the diffusion coefficient of formic acid electrooxidation on PdAu/C electrocatalysts are obtained under the quasi-steady-state conditions. The temperature dependence of the formic acid oxidation shows that the oxidation reaction is more sensitive to temperature at 0.1 and 0.7 V.
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