Creating interfaces of Cu0/Cu+ in oxide-derived copper catalysts for electrochemical CO2 reduction to multi-carbon products
A nanosheet catalyst with Cu0/Cu+ interfaces, derived from in-situ electroreduction of CuO NS, enhances the adsorption of *OCCOH intermediate, thus reducing the energy barrier of CC coupling and conducive to the formation of C2+ products. [Display omitted] Electrochemical carbon dioxide reduction re...
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Published in | Journal of colloid and interface science Vol. 645; pp. 735 - 742 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Inc
01.09.2023
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Subjects | |
Online Access | Get full text |
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Summary: | A nanosheet catalyst with Cu0/Cu+ interfaces, derived from in-situ electroreduction of CuO NS, enhances the adsorption of *OCCOH intermediate, thus reducing the energy barrier of CC coupling and conducive to the formation of C2+ products.
[Display omitted]
Electrochemical carbon dioxide reduction reaction (CO2RR) is an effective approach to capture CO2 and convert it into value-added chemicals and fuels, thereby reducing excess CO2 emissions. Recent reports have shown that copper-based catalysts exhibit excellent performance in converting CO2 into multi-carbon compounds and hydrocarbons. However, theselectivityto the couplingproductsispoor. Therefore, tuningCO2-reductionselectivitytoward C2+productsover Cu-based catalyst is one of the most important issues in CO2RR. Herein, we prepare a nanosheet catalyst with interfaces of Cu0/Cu+. The catalyst achieves Faraday efficiency (FE) of C2+ over 50% in a wide potential window between − 1.2 V to − 1.5 V versus reversible hydrogen electrode (vs. RHE). Moreover, the catalyst exhibits maximum FE of 44.5% and 58.9% towards C2H4 and C2+, with a partial current density of 10.5 mA cm−2 at − 1.4 V. Density functional theory (DFT) calculations show that the interface of Cu0/Cu+ facilitates CC coupling to form C2+ products, while inhibits CO2conversion toC1products. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0021-9797 1095-7103 |
DOI: | 10.1016/j.jcis.2023.04.133 |