Electrooxidation of methanol on polycrystalline and single crystal gold electrodes

被引：172

作者：

Borkowska, Z ^{[1
]}

Tymosiak-Zielinska, A ^{[1
]}

Shul, G ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland

来源：

ELECTROCHIMICA ACTA | 2004年 / 49卷 / 08期

关键词：

methanol; electro-oxidation; electrocatalysis; gold electrodes; single crystals;

D O I：

10.1016/j.electacta.2003.09.046

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Oxidation of methanol has been investigated on polycrystalline and single crystal gold electrodes: Au(poly), Au(1 11) and Au(2 1 0), in acidic, neutral and alkaline solutions. As expected, catalytic activity of gold towards methanol oxidation increases with increasing pH of the solution. It has been found that in all studied solutions methanol is oxidised in two potential regions, prior to gold surface oxide monolayer formation and in more positive potentials, on gold surface oxide after so called "turn over". Surface structure of the electrode has little influence on the oxidation current, however potentials at which oxidation is observed depends on the crystallographic orientation. The mechanism of electro-oxidation of methanol on gold is discussed. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：1209 / 1220

页数：12

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