Influence of adsorption processes on the CO2 electroreduction:: An electrochemical mass spectrometry study

被引：38

作者：

Dubé, P ^{[1
]}

Brisard, GM ^{[1
]}

机构：

[1] Univ Sherbrooke, Dept Chem, Sherbrooke, PQ J1K 2R1, Canada

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2005年 / 582卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

carbon monoxide; carbon dioxide; copper; online electrochemical mass spectrometry (EC/MS or DEMS); anion adsorption;

D O I：

10.1016/j.jelechem.2005.04.016

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The reduction of CO2 in sulfuric and perchloric acid electrolytes on a polycrystalline Cu surface has been investigated, using the online electrochemical mass spectrometry method (EUMS). Gaseous products, such as CH4, C2H4 and highly volatile products such as CH3OH, HCHO, are formed at overpotentials of hydrogen evolution reaction. The EC/MS results suggest that the reduction products formed depend on the presence of preadsorbed sulfate on the surface. The adsorbed anion from the electrolyte plays a role at the potential where HCHO formation occurs on copper. A mechanism for this process, based on electrocatalytic hydrogenation, is proposed. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：230 / 240

页数：11

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