Electro-reduction of carbon dioxide to formate on lead electrode in aqueous medium

被引：173
|
作者：
Innocent, B. [1 ,2 ]
Liaigre, D. [1 ]
Pasquier, D. [2 ]
Ropital, F. [2 ]
Leger, J. -M. [1 ]
Kokoh, K. B. [1 ]
机构：
[1] Univ Poitiers, CNRS, Lab Electrocatalysis, UMR 6503, F-86022 Poitiers, France
[2] IFP, F-92852 Rueil Malmaison, France
来源：
JOURNAL OF APPLIED ELECTROCHEMISTRY | 2009年 / 39卷 / 02期
关键词：
Pb electrode; CO2; Formate; Electro-reduction; Aqueous medium; ELECTROCHEMICAL CO2 REDUCTION; FIXED-BED REACTOR; FORMIC-ACID; HIGH-PRESSURE; METAL-ELECTRODES; COPPER ELECTRODE; CU ELECTRODE; ADSORBED CO; METHANOL; SURFACE;
D O I：
10.1007/s10800-008-9658-4
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrochemical reduction of carbon dioxide on a lead electrode was studied in aqueous medium. Preliminary investigations carried out by cyclic voltammetry were used to determine the optimized conditions of electrolysis. They revealed that the CO2 reduction process was enhanced at a pH value of 8.6 for the cathodic solution i.e. when the predominant form of CO2 was hydrogenocarbonate ion. Long-term electrolysis was carried out using both potentiometry and amperometry methods in a filter-press cell in which the two compartments were separated by a cation-exchange membrane (Nafion(A (R)) 423). Formate was detected and quantified by chromatography as the exclusive organic compound produced with a high Faradaic yield (from 65% to 90%). This study also revealed that the operating temperature played a key role in the hydrogenation reaction of carbon dioxide into formate in aqueous medium.
引用
收藏
页码：227 / 232
页数：6
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