Electro-oxidation of ethanol on gold: analysis of the reaction products and mechanism

被引：182

作者：

Tremiliosi-Filho, G

Gonzalez, ER

Motheo, AJ

Belgsir, EM

Leger, JM

Lamy, C

机构：

[1] Univ Poitiers, CNRS, Equipe Electrocatalyse, UMR 6503, F-86022 Poitiers, France

[2] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 444卷 / 01期

关键词：

ethanol; oxidation; gold electrode; electrolysis; product analysis;

D O I：

10.1016/S0022-0728(97)00536-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Although the electrocatalytic properties of gold are not as good as those of platinum, the oxidation of small alcohol molecules, such as ethanol, is possible at gold both in acid and alkaline media. By using programmed potential electrolysis coupled with chromatographic analysis of the products formed, the nature and the variation of their concentrations as a function of pH and time have been determined. In alkaline medium, the only product detected was acetic acid. On the other hand, in perchloric acid medium, the reaction products are highly dependent on the value of the oxidation potential, with the following successive steps: ethanol --> acetaldehyde --> acetic acid. A general tentative mechanism is proposed and discussed. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：31 / 39

页数：9

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