학술논문
Promoting electrochemical reduction of CO2to ethanol by B/N-doped sp3/sp2nanocarbon electrode
Document Type
Article
Source
Chinese Chemical Letters; October 2022, Vol. 33 Issue: 10 p4691-4694, 4p
Subject
Language
ISSN
10018417
Abstract
Electrochemical reduction of CO2to value-added chemicals holds promise for carbon utilization and renewable electricity storage. However, selective CO2reduction to multi-carbon fuels remains a significant challenge. Here, we report that B/N-doped sp3/sp2hybridized nanocarbon (BNHC), consisting of ultra-small nanoparticles with a sp3carbon core covered by a sp2carbon shell, is an efficient electrocatalyst for electrochemical reduction of CO2to ethanol at relatively low overpotentials. CO2reduction occurs with a Faradaic efficiency of 58.8%-69.1% for ethanol and acetate production at −0.5 ∼ −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 sp3/sp2carbon and B/N doping. Both sp3carbon and B/N doping contribute to enhanced ethanol production with sp2carbon reducing the overpotential for CO2reduction to ethanol.