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Cascade electrocatalysis via AgCu single-atom alloy and Ag nanoparticles in CO₂ electroreduction toward multicarbon products

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1038/s41467-023-41871-w
AuthorSearch for: ; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0002-8635-1965; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0002-9909-6705; Search for: ORCID identifier: https://orcid.org/0000-0002-7591-6676; Search for: ORCID identifier: https://orcid.org/0000-0001-9642-8674; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0002-1258-7684; Search for: ORCID identifier: https://orcid.org/0000-0002-8914-2309; Search for: 1; Search for: 1; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0002-1192-4634; Search for: ORCID identifier: https://orcid.org/0000-0002-3807-8431
Affiliation
  1. National Research Council of Canada. Clean Energy Innovation
FormatText, Article
Abstract
Electrocatalytic CO₂ reduction into value-added multicarbon products offers a means to close the anthropogenic carbon cycle using renewable electricity. However, the unsatisfactory catalytic selectivity for multicarbon products severely hinders the practical application of this technology. In this paper, we report a cascade AgCu single-atom and nanoparticle electrocatalyst, in which Ag nanoparticles produce CO and AgCu single-atom alloys promote C-C coupling kinetics. As a result, a Faradaic efficiency (FE) of 94 ± 4% toward multicarbon products is achieved with the as-prepared AgCu single-atom and nanoparticle catalyst under ~720 mA cm−2 working current density at −0.65 V in a flow cell with alkaline electrolyte. Density functional theory calculations further demonstrate that the high multicarbon product selectivity results from cooperation between AgCu single-atom alloys and Ag nanoparticles, wherein the Ag single-atom doping of Cu nanoparticles increases the adsorption energy of *CO on Cu sites due to the asymmetric bonding of the Cu atom to the adjacent Ag atom with a compressive strain.
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PublisherNature Research
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In
  • Nature Communications 14, no. 1, 6142 (5 October 2023).
LanguageEnglish
Peer reviewedYes
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Record identifier283b6604-08b0-45aa-90c6-29b1df4f5c56
Record created2024-05-29
Record modified2024-05-29
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