Electrolyte effects on the faradaic efficiency of CO2 reduction to CO on a gold electrode
The electrochemical reduction of CO2 aims to be a central technology to store excess electricity generated by wind and solar energy. However, the reaction is hindered by the competition with the hydrogen evolution reaction. In this paper, we present a detailed quantitative study of the Faradaic effi...
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ftunivleiden:oai:scholarlypublications.universiteitleiden.nl:item_3204416 2023-05-15T15:52:41+02:00 Electrolyte effects on the faradaic efficiency of CO2 reduction to CO on a gold electrode Marcandalli, G. Goyal, A. Koper, M.T.M. 2021 https://hdl.handle.net/1887/3204416 https://doi.org/10.1021/acscatal.1c00272 en eng doi:10.1021/acscatal.1c00272 lucris-id: 415634111 https://hdl.handle.net/1887/3204416 https://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND ACS Catalysis Article / Letter to editor info:eu-repo/semantics/article Text 2021 ftunivleiden https://doi.org/10.1021/acscatal.1c00272 2021-11-03T23:10:51Z The electrochemical reduction of CO2 aims to be a central technology to store excess electricity generated by wind and solar energy. However, the reaction is hindered by the competition with the hydrogen evolution reaction. In this paper, we present a detailed quantitative study of the Faradaic efficiency (FE) to CO on a gold electrode under well-defined mass-transport conditions using rotating ring-disk electrode voltammetry. Varying the concentration of the bicarbonate and the electrolyte cation employing different rotation rates, we map out how these parameters affect the FE(CO). We identify two different potential regimes for the electrolyte effects, characterized by a different dependence on the cation and bicarbonate concentrations. For hydrogen evolution, we analyze the nature of the proton donor for an increasingly negative potential, showing how it changes from carbonic acid to bicarbonate and to water. Our study gives detailed insights into the role of electrolyte composition and mass transport, and helps defining optimized electrolyte conditions for a high FE(CO). Catalysis and Surface Chemistry Article in Journal/Newspaper Carbonic acid Leiden University Scholarly Publications ACS Catalysis 11 9 4936 4945 |
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Leiden University Scholarly Publications |
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ftunivleiden |
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English |
description |
The electrochemical reduction of CO2 aims to be a central technology to store excess electricity generated by wind and solar energy. However, the reaction is hindered by the competition with the hydrogen evolution reaction. In this paper, we present a detailed quantitative study of the Faradaic efficiency (FE) to CO on a gold electrode under well-defined mass-transport conditions using rotating ring-disk electrode voltammetry. Varying the concentration of the bicarbonate and the electrolyte cation employing different rotation rates, we map out how these parameters affect the FE(CO). We identify two different potential regimes for the electrolyte effects, characterized by a different dependence on the cation and bicarbonate concentrations. For hydrogen evolution, we analyze the nature of the proton donor for an increasingly negative potential, showing how it changes from carbonic acid to bicarbonate and to water. Our study gives detailed insights into the role of electrolyte composition and mass transport, and helps defining optimized electrolyte conditions for a high FE(CO). Catalysis and Surface Chemistry |
format |
Article in Journal/Newspaper |
author |
Marcandalli, G. Goyal, A. Koper, M.T.M. |
spellingShingle |
Marcandalli, G. Goyal, A. Koper, M.T.M. Electrolyte effects on the faradaic efficiency of CO2 reduction to CO on a gold electrode |
author_facet |
Marcandalli, G. Goyal, A. Koper, M.T.M. |
author_sort |
Marcandalli, G. |
title |
Electrolyte effects on the faradaic efficiency of CO2 reduction to CO on a gold electrode |
title_short |
Electrolyte effects on the faradaic efficiency of CO2 reduction to CO on a gold electrode |
title_full |
Electrolyte effects on the faradaic efficiency of CO2 reduction to CO on a gold electrode |
title_fullStr |
Electrolyte effects on the faradaic efficiency of CO2 reduction to CO on a gold electrode |
title_full_unstemmed |
Electrolyte effects on the faradaic efficiency of CO2 reduction to CO on a gold electrode |
title_sort |
electrolyte effects on the faradaic efficiency of co2 reduction to co on a gold electrode |
publishDate |
2021 |
url |
https://hdl.handle.net/1887/3204416 https://doi.org/10.1021/acscatal.1c00272 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
ACS Catalysis |
op_relation |
doi:10.1021/acscatal.1c00272 lucris-id: 415634111 https://hdl.handle.net/1887/3204416 |
op_rights |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1021/acscatal.1c00272 |
container_title |
ACS Catalysis |
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11 |
container_issue |
9 |
container_start_page |
4936 |
op_container_end_page |
4945 |
_version_ |
1766387791919316992 |