Nanoporous Ag-Sn derived from codeposited AgCl-SnO2 for the electrocatalytic reduction of CO2 with high formate selectivity
Nanoporous Ag-Sn was prepared by direct electroreduction of a codeposited AgCl-SnO2 mixture in 0.1 M HCl, and evaluated as an electrode catalyst for the reduction of CO2 in 0.5 M KHCO3. A volcano-type correlation between selectivity for the formate product and the atomic ratio of Ag to Sn in the nan...
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doaj-563c1a29547647d78a73148cd89627842020-11-24T20:43:28ZengElsevierElectrochemistry Communications1388-24812019-05-011025256Nanoporous Ag-Sn derived from codeposited AgCl-SnO2 for the electrocatalytic reduction of CO2 with high formate selectivityXiaoyan Wang0Wei Xiao1Jichen Zhang2Zhiyong Wang3Xianbo Jin4Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430072, PR ChinaHubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430072, PR ChinaHubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430072, PR ChinaHubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430072, PR ChinaCorresponding author.; Hubei Key Laboratory of Electrochemical Power Sources, College of Chemistry and Molecular Sciences, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430072, PR ChinaNanoporous Ag-Sn was prepared by direct electroreduction of a codeposited AgCl-SnO2 mixture in 0.1 M HCl, and evaluated as an electrode catalyst for the reduction of CO2 in 0.5 M KHCO3. A volcano-type correlation between selectivity for the formate product and the atomic ratio of Ag to Sn in the nanoporous catalysts was revealed. It was found that the bimetallic catalyst with a Ag:Sn ratio of 3:2, mainly composed of the Ag4Sn alloy, showed excellent catalytic performance for the conversion of CO2 to formate. This catalyst delivered a current of about 10 mA cm−2 with a high formate faradaic efficiency of about 85% at −0.8 V vs. the reversible hydrogen electrode. Moreover, the catalytic activity remained reasonably stable during a 13.5-hour electrolysis. Keywords: Ag-Sn bimetals, Solid electroreduction, Electrocatalysis, Carbon dioxide, Formatehttp://www.sciencedirect.com/science/article/pii/S1388248119300815 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xiaoyan Wang Wei Xiao Jichen Zhang Zhiyong Wang Xianbo Jin |
spellingShingle |
Xiaoyan Wang Wei Xiao Jichen Zhang Zhiyong Wang Xianbo Jin Nanoporous Ag-Sn derived from codeposited AgCl-SnO2 for the electrocatalytic reduction of CO2 with high formate selectivity Electrochemistry Communications |
author_facet |
Xiaoyan Wang Wei Xiao Jichen Zhang Zhiyong Wang Xianbo Jin |
author_sort |
Xiaoyan Wang |
title |
Nanoporous Ag-Sn derived from codeposited AgCl-SnO2 for the electrocatalytic reduction of CO2 with high formate selectivity |
title_short |
Nanoporous Ag-Sn derived from codeposited AgCl-SnO2 for the electrocatalytic reduction of CO2 with high formate selectivity |
title_full |
Nanoporous Ag-Sn derived from codeposited AgCl-SnO2 for the electrocatalytic reduction of CO2 with high formate selectivity |
title_fullStr |
Nanoporous Ag-Sn derived from codeposited AgCl-SnO2 for the electrocatalytic reduction of CO2 with high formate selectivity |
title_full_unstemmed |
Nanoporous Ag-Sn derived from codeposited AgCl-SnO2 for the electrocatalytic reduction of CO2 with high formate selectivity |
title_sort |
nanoporous ag-sn derived from codeposited agcl-sno2 for the electrocatalytic reduction of co2 with high formate selectivity |
publisher |
Elsevier |
series |
Electrochemistry Communications |
issn |
1388-2481 |
publishDate |
2019-05-01 |
description |
Nanoporous Ag-Sn was prepared by direct electroreduction of a codeposited AgCl-SnO2 mixture in 0.1 M HCl, and evaluated as an electrode catalyst for the reduction of CO2 in 0.5 M KHCO3. A volcano-type correlation between selectivity for the formate product and the atomic ratio of Ag to Sn in the nanoporous catalysts was revealed. It was found that the bimetallic catalyst with a Ag:Sn ratio of 3:2, mainly composed of the Ag4Sn alloy, showed excellent catalytic performance for the conversion of CO2 to formate. This catalyst delivered a current of about 10 mA cm−2 with a high formate faradaic efficiency of about 85% at −0.8 V vs. the reversible hydrogen electrode. Moreover, the catalytic activity remained reasonably stable during a 13.5-hour electrolysis. Keywords: Ag-Sn bimetals, Solid electroreduction, Electrocatalysis, Carbon dioxide, Formate |
url |
http://www.sciencedirect.com/science/article/pii/S1388248119300815 |
work_keys_str_mv |
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