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- W3130031214 abstract "Electrochemical CO2 reduction to multi-carbon fuels and chemicals is intriguing but remains a challenge. Here, we report that a combination of Sn doping and creation of oxygen vacancies (VO) can synergistically boost CO2 reduction to C2H4 over CuO nanosheets with an onset potential of −0.7 V (versus reversible hydrogen electrode). The activity and selectivity of CuO can be easily tuned by manipulation of Sn dopant and VO contents. The Faradaic efficiency toward C2H4 formation over Sn-doped CuO(VO) approaches 48.5% ± 1.2%, which maintains stability over 24 h at a mild overpotential, in contrast to a maximum of 26.8% ± 2.2% over pristine CuO. The Sn-doped CuO(VO) catalyst presents an approximately 2.3-fold improvement in C2H4 current compared to undoped CuO at similar overpotentials. Theoretical calculations further show that doping of Vo-enriched CuO surface by Sn lowers the dimerization energy of adsorbed CO intermediate, thereby promoting C–C coupling to yield C2H4." @default.
- W3130031214 created "2021-03-01" @default.
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- W3130031214 date "2021-03-01" @default.
- W3130031214 modified "2023-10-18" @default.
- W3130031214 title "Enhanced electrochemical CO2 reduction to ethylene over CuO by synergistically tuning oxygen vacancies and metal doping" @default.
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- W3130031214 doi "https://doi.org/10.1016/j.xcrp.2021.100356" @default.
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