期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 594, 期 1, 页码 65-72出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2006.05.022
关键词
ethanol electrooxidation; PtRh alloy catalysts; catalytic activity; apparent activation energy; Nyquist plot; C-C bond dissociation
A comparative study on the catalytic activity for ethanol oxidation of electrodeposited platinum and platinum-rhodium alloys has been carried out. Voltammetry, polarisation study and electrochemical impedance spectroscopy were used for the characterization of the electrodes. A study on the temperature-dependence of the electrocatalytic activities afforded the determination of apparent activation energies for ethanol oxidation. A pronounced effect of catalyst composition on ethanol oxidation was observed. Of the different atomic composition of PtRh alloys studied, the best ethanol oxidation behavior was observed for the Pt74Rh26 electrode. The results indicate that the enhancement in electrocatalytic activity for this PtRh catalyst in comparison to Pt itself can be ascribed to an improvement of C-C bond dissociation rather than to a bifunctional mechanism. (c) 2006 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据