期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 552, 期 -, 页码 426-431出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.05.073
关键词
CO2 reduction; Electrocatalyst; Copper; Native oxide; Faradaic efficiency
资金
- National Key Research and Development Program of China [2018YFA0209401, 2017YFA0206901]
- Natural Science Foundation of China [21773036, 21473038]
- Science and Technology Commission of Shanghai Municipality [19XD1420400, 17JC1402000]
- Innovation Program of Shanghai Municipal Education Commission [2019-01-07-00-07-E00045]
Developing an effective catalyst to reduce carbon dioxide (CO2) to value-added C2+ products is a key challenge for CO2 utilization. Here we report a core-shell copper with native oxide (Cu@Cu2O) catalyst featuring a thin native oxide layer on the surface grown under ambient conditions. The Cu(I) oxide species on Cu@Cu2O surface remained relatively stable against reduction under CO2 electroreduction condition, and the synergism between surface Cu+ and Cu-0 in Cu@Cu2O contributed to boosting its efficiency and selectivity toward C-2 products. This Cu@Cu2O catalyst achieved an excellent selectivity (similar to 50% at -1.0 V vs reversible hydrogen electrode) for C-2 (ethylene and ethanol) production. (C) 2019 Elsevier Inc. All rights reserved.
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