期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202218664
关键词
CO2 Photoelectroreduction; Ethanol Selectivity; Graphene; Silicon Carbide; Promoting C-C Coupling
Using sunlight and a graphene/SiC catalyst, we achieved a high selectivity of>99% for ethanol production from CO2 through artificial photosynthesis. The CO2 conversion rate reached up to 17.1 mmol g(cat)(-1) h(-1) with sustained performance. Experimental and theoretical investigations revealed that the optimal interfacial layer between SiC substrate and graphene overlayer facilitated efficient electron transfer and CO2 to C2H5OH conversion.
Using sunlight to produce valuable chemicals and fuels from carbon dioxide (CO2), i.e., artificial photosynthesis (AP) is a promising strategy to achieve solar energy storage and a negative carbon cycle. However, selective synthesis of C-2 compounds with a high CO2 conversion rate remains challenging for current AP technologies. We performed CO2 photoelectroreduction over a graphene/silicon carbide (SiC) catalyst under simulated solar irradiation with ethanol (C2H5OH) selectivity of>99 % and a CO2 conversion rate of up to 17.1 mmol g(cat)(-1) h(-1) with sustained performance. Experimental and theoretical investigations indicated an optimal interfacial layer to facilitate the transfer of photogenerated electrons from the SiC substrate to the few-layer graphene overlayer, which also favored an efficient CO2 to C2H5OH conversion pathway.
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