Journal
NATURE CATALYSIS
Volume 2, Issue 5, Pages 423-430Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41929-019-0269-8
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Funding
- Department of Energy (USA) [DE-FE0029868]
- National Natural Science Foundation of China [51601030, 21773023]
- National Science Foundation Faculty Early Career Development program [CBET-1350911]
- International Institute for Nanotechnology (IIN) at Northwestern University
- Institute for Sustainability and Energy (ISEN) at Northwestern University
- Welch Foundation [F-1959-20180324]
- UT Austin
- DOE's Office of Energy Efficiency and Renewable Energy
- Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource [NSF ECCS-1542205]
- Materials Research Science and Engineering Centers (MRSEC) program at the Materials Research Center [NSF DMR 1121262]
- IIN
- MRSEC
- SHyNE
- DOE Office of Science [DE-SC0012704]
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Upgrading carbon dioxide to high-value multicarbon (C2+) products is one promising avenue for fuel and chemical production. Among all the monometallic catalysts, copper has attracted much attention because of its unique ability to convert CO2 or CO into C(2+)( )products with an appreciable selectivity. Although numerous attempts have been made to synthesize Cu materials that expose the desired facets, it still remains a challenge to obtain high-quality nanostructured Cu catalysts for the electroreduction of CO2/CO. Here we report a facile synthesis of freestanding triangular-shaped two-dimensional Cu nanosheets that selectively expose the (111) surface. In a 2 M KOH electrolyte, the Cu nanosheets exhibit an acetate Faradaic efficiency of 48% with an acetate partial current density up to 131mA cm(-2) in electrochemical CO reduction. Further analysis suggest that the high acetate selectivity is attributed to the suppression of ethylene and ethanol formation, probably due to the reduction of exposed (100) and (110) surfaces.
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