Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 22, Pages 8706-8712Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201912348
Keywords
cadmium sulfide; CO2 electroreduction; flow cells; high-curvature structures; proximity effect
Categories
Funding
- National Natural Science Foundation of China [21431006, 21761132008, 51702312, 21975237]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521001]
- Key Research Program of Frontier Sciences, CAS [QYZDJ-SSWSLH036]
- National Basic Research Program of China [2014CB931800, 2018YFA0702001]
- Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS [2015HSC-UE007]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA21000000]
- Fundamental Research Funds for the Central Universities [WK2340000076]
- Recruitment Program of Global Youth Experts
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A considerable challenge in the conversion of carbon dioxide into useful fuels comes from the activation of CO2 to CO2.- or other intermediates, which often requires precious-metal catalysts, high overpotentials, and/or electrolyte additives (e.g., ionic liquids). We report a microwave heating strategy for synthesizing a transition-metal chalcogenide nanostructure that efficiently catalyzes CO2 electroreduction to carbon monoxide (CO). We found that the cadmium sulfide (CdS) nanoneedle arrays exhibit an unprecedented current density of 212 mA cm(-2) with 95.5 +/- 4.0 % CO Faraday efficiency at -1.2 V versus a reversible hydrogen electrode (RHE; without iR correction). Experimental and computational studies show that the high-curvature CdS nanostructured catalyst has a pronounced proximity effect which gives rise to large electric field enhancement, which can concentrate alkali-metal cations resulting in the enhanced CO2 electroreduction efficiency.
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