期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 140, 期 47, 页码 16042-16047出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b10380
关键词
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资金
- U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences [DE-SC0016417]
- U.S. National Science Foundation [CBET-1510810]
- U.S. DOE [DE-FG02-03ER15476]
- Laboratory Directed Research and Development Program through Brookhaven National Laboratory under U.S. DOE [LDRD 18-047, DE-SC0012704]
- DOE Office of Science by Brookhaven National Laboratory [DE-SC0012704]
- Synchrotron Catalysis Consortium (U.S. DOE, Office of Basic Energy Sciences) [DE-SC0012335]
- Div Of Chem, Bioeng, Env, & Transp Sys [1510810] Funding Source: National Science Foundation
Framework nitrogen atoms of carbon nitride (C3N4) can coordinate with and activate metal sites for catalysis. In this study, C3N4 was employed to harvest visible light and activate Co2+ sites, without the use of additional ligands, in photochemical CO2 reduction. Photocatalysts containing single Co2+ sites on C3N4 were prepared by a simple deposition method and demonstrated excellent activity and product selectivity toward CO formation. A turnover number of more than 200 was obtained for CO production using the synthesized photocatalyst under visible-light irradiation. Inactive cobalt oxides formed at relatively high cobalt loadings but did not alter product selectivity. Further studies with X-ray absorption spectroscopy confirmed the presence of single Co2+ sites on C3N4 and their important role in achieving selective CO2 reduction.
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