Electrochemical reduction of CO2 at an Ag electrode in KOH-methanol at low temperature

被引：51

作者：

Kaneco, S ^{[1
]}

Iiba, K

Ohta, K

Mizuno, T

Saji, A

机构：

[1] Mie Univ, Fac Engn, Dept Chem Mat, Tsu, Mie 5148507, Japan

[2] Chubu Elect Power Co Inc, Elect Power R&D Ctr, Midori Ku, Nagoya, Aichi 4598001, Japan

来源：

ELECTROCHIMICA ACTA | 1998年 / 44卷 / 04期

关键词：

electrochemical reduction; carbon dioxide; Ag electrode; methanol electrolyte; carbon monoxide;

D O I：

10.1016/S0013-4686(98)00178-9

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 CO2 in 0.1 M KOH-methanol electrolyte with a silver electrode was investigated at 248, 258 and 273 K. The main products from CO2 were carbon monoxide and formic acid. A predominant formation of CO from CO2 on Ag electrode in the methanol electrolyte was found. The formation efficiency of CO increased at relatively negative potential as temperature decreased, however in contrast, hydrogen formation decreased. The selectivity of CO2 reduction over H-2 evolution was ameliorated by lowering temperature. From the Tafel plot study, a sufficiently high mass transfer of CO2 to the electrode was confirmed even in low temperature region. Consequently, it was found that low temperature was extremely effective for the depression of hydrogen formation on Ag electrode in the KOH-methanol. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：573 / 578

页数：6

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