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Effect of the Cu(2+/1+) Redox Potential of Non-Macrocyclic Cu Complexes on Electrochemical CO(2) Reduction
Cu(2+/1+) complexes facilitate the reduction of CO(2) to valuable chemicals. The catalytic conversion likely involves the binding of CO(2) and/or reduction intermediates to Cu(2+/1+), which in turn could be influenced by the electron density on the Cu(2+/1+) ion. Herein we investigated whether modul...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10343594/ https://www.ncbi.nlm.nih.gov/pubmed/37446840 http://dx.doi.org/10.3390/molecules28135179 |
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author | Kim, Kyuman Wagner, Pawel Wagner, Klaudia Mozer, Attila J. |
author_facet | Kim, Kyuman Wagner, Pawel Wagner, Klaudia Mozer, Attila J. |
author_sort | Kim, Kyuman |
collection | PubMed |
description | Cu(2+/1+) complexes facilitate the reduction of CO(2) to valuable chemicals. The catalytic conversion likely involves the binding of CO(2) and/or reduction intermediates to Cu(2+/1+), which in turn could be influenced by the electron density on the Cu(2+/1+) ion. Herein we investigated whether modulating the redox potential of Cu(2+/1+) complexes by changing their ligand structures influenced their CO(2) reduction performance significantly. We synthesised new heteroleptic Cu(2/1+) complexes, and for the first time, studied a (Cu-bis(8-quinolinolato) complex, covering a Cu(2+/1+) redox potential range of 1.3 V. We have found that the redox potential influenced the Faradaic efficiency of CO(2) reduction to CO. However, no correlation between the redox potential and the Faradaic efficiency for methane was found. The lack of correlation could be attributed to the presence of a Cu-complex-derived catalyst deposited on the electrodes leading to a heterogeneous catalytic mechanism, which is controlled by the structure of the in situ deposited catalyst and not the redox potential of the pre-cursor Cu(2+/1+) complexes. |
format | Online Article Text |
id | pubmed-10343594 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-103435942023-07-14 Effect of the Cu(2+/1+) Redox Potential of Non-Macrocyclic Cu Complexes on Electrochemical CO(2) Reduction Kim, Kyuman Wagner, Pawel Wagner, Klaudia Mozer, Attila J. Molecules Article Cu(2+/1+) complexes facilitate the reduction of CO(2) to valuable chemicals. The catalytic conversion likely involves the binding of CO(2) and/or reduction intermediates to Cu(2+/1+), which in turn could be influenced by the electron density on the Cu(2+/1+) ion. Herein we investigated whether modulating the redox potential of Cu(2+/1+) complexes by changing their ligand structures influenced their CO(2) reduction performance significantly. We synthesised new heteroleptic Cu(2/1+) complexes, and for the first time, studied a (Cu-bis(8-quinolinolato) complex, covering a Cu(2+/1+) redox potential range of 1.3 V. We have found that the redox potential influenced the Faradaic efficiency of CO(2) reduction to CO. However, no correlation between the redox potential and the Faradaic efficiency for methane was found. The lack of correlation could be attributed to the presence of a Cu-complex-derived catalyst deposited on the electrodes leading to a heterogeneous catalytic mechanism, which is controlled by the structure of the in situ deposited catalyst and not the redox potential of the pre-cursor Cu(2+/1+) complexes. MDPI 2023-07-03 /pmc/articles/PMC10343594/ /pubmed/37446840 http://dx.doi.org/10.3390/molecules28135179 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Kim, Kyuman Wagner, Pawel Wagner, Klaudia Mozer, Attila J. Effect of the Cu(2+/1+) Redox Potential of Non-Macrocyclic Cu Complexes on Electrochemical CO(2) Reduction |
title | Effect of the Cu(2+/1+) Redox Potential of Non-Macrocyclic Cu Complexes on Electrochemical CO(2) Reduction |
title_full | Effect of the Cu(2+/1+) Redox Potential of Non-Macrocyclic Cu Complexes on Electrochemical CO(2) Reduction |
title_fullStr | Effect of the Cu(2+/1+) Redox Potential of Non-Macrocyclic Cu Complexes on Electrochemical CO(2) Reduction |
title_full_unstemmed | Effect of the Cu(2+/1+) Redox Potential of Non-Macrocyclic Cu Complexes on Electrochemical CO(2) Reduction |
title_short | Effect of the Cu(2+/1+) Redox Potential of Non-Macrocyclic Cu Complexes on Electrochemical CO(2) Reduction |
title_sort | effect of the cu(2+/1+) redox potential of non-macrocyclic cu complexes on electrochemical co(2) reduction |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10343594/ https://www.ncbi.nlm.nih.gov/pubmed/37446840 http://dx.doi.org/10.3390/molecules28135179 |
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