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Title: Nature of the Active Sites for CO Reduction on Copper Nanoparticles; Suggestions for Optimizing Performance

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.7b03300· OSTI ID:1467599

Recent experiments show that the grain boundaries (GBs) of copper nanoparticles (NPs) lead to an outstanding performance in reducing CO2 and CO to alcohol products. We report here multiscale simulations that simulate experimental synthesis conditions to predict the structure of a 10 nm Cu NP (158 555 atoms). To identify active sites, we first predict the CO binding at a large number of sites and select four exhibiting CO binding stronger than the (211) step surface. Then, we predict the formation energy of the *OCCOH intermediate as a descriptor for C–C coupling, identifying two active sites, both of which have an under-coordinated surface square site adjacent to a subsurface stacking fault. As a result, we then propose a periodic Cu surface (4 by 4 supercell) with a similar site that substantially decreases the formation energy of *OCCOH, by 0.14 eV.

Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0004993
OSTI ID:
1467599
Journal Information:
Journal of the American Chemical Society, Vol. 139, Issue 34; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 122 works
Citation information provided by
Web of Science

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Evidence for product-specific active sites on oxide-derived Cu catalysts for electrochemical CO2 reduction journal December 2018
Efficient electrocatalytic conversion of carbon monoxide to propanol using fragmented copper journal February 2019
Atomically Defined Undercoordinated Active Sites for Highly Efficient CO 2 Electroreduction journal November 2019
Two-dimensional copper nanosheets for electrochemical reduction of carbon monoxide to acetate journal April 2019
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First principles-based multiscale atomistic methods for input into first principles nonequilibrium transport across interfaces journal August 2018
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