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Title: Pulsed electroreduction of CO{sub 2} on Cu-Ag alloy electrodes

Abstract

Highly selective reduction of CO{sub 2} to C{sub 2} compounds such as CH{sub 3}CHO, C{sub 2}H{sub 5}OH, and C{sub 2}H{sub 4} has been achieved on CuAg alloy electrodes by pulsed electroreduction. The faradaic efficiencies of C{sub 2} compounds produced on CuAg alloy electrodes were varied with the atomic ratio of Cu to Ag. The total value of faradaic efficiencies for these C{sub 2} compounds was 54.2% for the pulsed electroreduction on a CuAg alloy electrode (Cu/Ag = 28/72) with an anodic bias of V{sub a} = {minus}0.4 V and a cathodic bias of V{sub c} = {minus}2.0 V vs. Ag/AgCl. It was found that the formation of an oxide layer on Cu and the desorption of intermediates on Ag under anodic bias were key factors for the selective reduction of CO{sub 2} to C{sub 2} compounds on CuAg alloy electrodes.

Authors:
; ;
Publication Date:
Research Org.:
Kyushu Inst. of Tech., Kitakyushu (JP)
OSTI Identifier:
20080583
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 147; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0013-4651
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 10 SYNTHETIC FUELS; CARBON DIOXIDE; ELECTROLYSIS; REDUCTION; SYNTHESIS; ETHYLENE; ETHANOL; ACETALDEHYDE; ELECTROCHEMICAL CELLS; COPPER ALLOYS; SILVER ALLOYS

Citation Formats

Ishimaru, S., Shiratsuchi, R., and Nogami, G. Pulsed electroreduction of CO{sub 2} on Cu-Ag alloy electrodes. United States: N. p., 2000. Web. doi:10.1149/1.1393448.
Ishimaru, S., Shiratsuchi, R., & Nogami, G. Pulsed electroreduction of CO{sub 2} on Cu-Ag alloy electrodes. United States. doi:10.1149/1.1393448.
Ishimaru, S., Shiratsuchi, R., and Nogami, G. Mon . "Pulsed electroreduction of CO{sub 2} on Cu-Ag alloy electrodes". United States. doi:10.1149/1.1393448.
@article{osti_20080583,
title = {Pulsed electroreduction of CO{sub 2} on Cu-Ag alloy electrodes},
author = {Ishimaru, S. and Shiratsuchi, R. and Nogami, G.},
abstractNote = {Highly selective reduction of CO{sub 2} to C{sub 2} compounds such as CH{sub 3}CHO, C{sub 2}H{sub 5}OH, and C{sub 2}H{sub 4} has been achieved on CuAg alloy electrodes by pulsed electroreduction. The faradaic efficiencies of C{sub 2} compounds produced on CuAg alloy electrodes were varied with the atomic ratio of Cu to Ag. The total value of faradaic efficiencies for these C{sub 2} compounds was 54.2% for the pulsed electroreduction on a CuAg alloy electrode (Cu/Ag = 28/72) with an anodic bias of V{sub a} = {minus}0.4 V and a cathodic bias of V{sub c} = {minus}2.0 V vs. Ag/AgCl. It was found that the formation of an oxide layer on Cu and the desorption of intermediates on Ag under anodic bias were key factors for the selective reduction of CO{sub 2} to C{sub 2} compounds on CuAg alloy electrodes.},
doi = {10.1149/1.1393448},
journal = {Journal of the Electrochemical Society},
issn = {0013-4651},
number = 5,
volume = 147,
place = {United States},
year = {2000},
month = {5}
}