期刊
CHINESE CHEMICAL LETTERS
卷 33, 期 10, 页码 4691-4694出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2021.12.063
关键词
CO2 reduction; Ethanol; B/N-doped sp(3)/sp(2) hybridized nanocarbon; Electrocatalysis; multi-carbon product
资金
- National Natural Science Foundation of China [22076019, 21707016]
- Youth Talent Support Program of Liaoning Province [XLYC2007069]
- U.S. Department of Energy (DOE), Office of Basic Energy Sciences [DE-SC0015739]
- U.S. Department of Energy (DOE) [DE-SC0015739] Funding Source: U.S. Department of Energy (DOE)
B/N-doped sp(3)/sp(2) hybridized nanocarbon (BNHC) is an efficient electrocatalyst for the electrochemical reduction of CO2 to ethanol at relatively low overpotentials, with high selectivity for ethanol. The high selectivity for ethanol is attributed to the integrated effect of sp(3)/sp(2) carbon and B/N doping.
Electrochemical reduction of CO2 to value-added chemicals holds promise for carbon utilization and renewable electricity storage. However, selective CO2 reduction to multi-carbon fuels remains a significant challenge. Here, we report that B/N-doped sp(3)/sp(2) hybridized nanocarbon (BNHC), consisting of ultrasmall nanoparticles with a sp(3) carbon core covered by a sp(2) carbon shell, is an efficient electrocatalyst for electrochemical reduction of CO2 to ethanol at relatively low overpotentials. CO2 reduction occurs with a Faradaic efficiency of 58.8%-69.1% for ethanol and acetate production at -0.5 similar to -0.6 V (vs. RHE), among which 51.6%-56.0% is for ethanol. The high selectivity for ethanol is due to the integrated effect of sp(3)/sp(2) carbon and B/N doping. Both sp(3) carbon and B/N doping contribute to enhanced ethanol production with sp(2) carbon reducing the overpotential for CO2 reduction to ethanol. (C) 2022 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
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