Ethanol oxidation on PtRu electrodes studied by differential electrochemical mass spectrometry

被引：253
|
作者：
Fujiwara, N
Friedrich, KA
Stimming, U
机构：
[1] Forschungszentrum Julich, IEV, D-52425 Julich, Germany
[2] Minist Int Trade & Ind, AIST, Osaka Natl Res Inst, Ikeda, Osaka 5638577, Japan
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1999年 / 472卷 / 02期
关键词：
electrocatalytic oxidation; ethanol; PtRu electrode; DEMS;
D O I：
10.1016/S0022-0728(99)00282-X
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The oxidation of ethanol in aqueous HClO(4), was studied on co-electrodeposited PtRu electrodes in a temperature range of 5-40 degrees C by means of differential electrochemical mass spectrometry (DEMS). The formation of carbon dioxide and acetaldehyde were monitored by ion currents at appropriate masses. The presence of Ru promotes the surface reaction between the organic chemisorbate and the oxidant, whereas it may inhibit ethanol adsorption on the electrode. Optimum composition of the electrode for total oxidation was found to vary from Pt(0.67)Ru(0.33) at 5 degrees C to Pt(0.85)Ru(0.15) at higher temperatures. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：120 / 125
页数：6
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