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- Title
Cascade electrocatalysis via AgCu single-atom alloy and Ag nanoparticles in CO<sub>2</sub> electroreduction toward multicarbon products.
- Authors
Du, Cheng; Mills, Joel P.; Yohannes, Asfaw G.; Wei, Wei; Wang, Lei; Lu, Siyan; Lian, Jian-Xiang; Wang, Maoyu; Guo, Tao; Wang, Xiyang; Zhou, Hua; Sun, Cheng-Jun; Wen, John Z.; Kendall, Brian; Couillard, Martin; Guo, Hongsheng; Tan, ZhongChao; Siahrostami, Samira; Wu, Yimin A.
- 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. Electrocatalytic CO2 reduction into multicarbon products offers a means to close the anthropogenic carbon cycle using renewable electricity. Here, the authors report a cascade AgCu single-atom and nanoparticle electrocatalyst with favorable properties to improve the selectivity of multicarbon products.
- Subjects
ELECTROCATALYSIS; ELECTROLYTIC reduction; COPPER; CARBON cycle; COUPLING reactions (Chemistry); NANOPARTICLES
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-41871-w