当前位置: X-MOL 学术Nat. Catal. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Electrocatalytic reduction of CO 2 to ethylene and ethanol through hydrogen-assisted C–C coupling over fluorine-modified copper
Nature Catalysis ( IF 37.8 ) Pub Date : 2020-04-20 , DOI: 10.1038/s41929-020-0450-0
Wenchao Ma , Shunji Xie , Tongtong Liu , Qiyuan Fan , Jinyu Ye , Fanfei Sun , Zheng Jiang , Qinghong Zhang , Jun Cheng , Ye Wang

Electrocatalytic reduction of CO2 into multicarbon (C2+) products is a highly attractive route for CO2 utilization; however, the yield of C2+ products remains low because of the limited C2+ selectivity at high CO2 conversion rates. Here we report a fluorine-modified copper catalyst that exhibits an ultrahigh current density of 1.6 A cm−2 with a C2+ (mainly ethylene and ethanol) Faradaic efficiency of 80% for electrocatalytic CO2 reduction in a flow cell. The C2–4 selectivity reaches 85.8% at a single-pass yield of 16.5%. We show a hydrogen-assisted C–C coupling mechanism between adsorbed CHO intermediates for C2+ formation. Fluorine enhances water activation, CO adsorption and hydrogenation of adsorbed CO to CHO intermediate that can readily undergo coupling. Our findings offer an opportunity to design highly active and selective CO2 electroreduction catalysts with potential for practical application.



中文翻译:

在氟改性铜上通过氢辅助的CC偶联将CO 2电催化还原为乙烯和乙醇

将CO 2电催化还原为多碳(C 2+)产品是利用CO 2的极具吸引力的途径。然而,由于在高CO 2转化率下有限的C 2+选择性,C 2+产品的产率仍然很低。在这里,我们报告了一种氟改性的铜催化剂,该催化剂表现出1.6 A cm -2的超高电流密度,并且流通池中电催化还原CO 2的C 2+(主要是乙烯和乙醇)的法拉第效率为80%。的C 2- 4选择性达到85.8%,单次通过产率为16.5%。我们显示了氢辅助的C–C耦合的C 2+形成的CHO中间体之间的耦合机理。氟增强了水活化,CO吸附以及被吸附的CO氢化成CHO中间体的能力,而CHO中间体容易发生偶联。我们的发现为设计具有实际应用潜力的高活性和选择性CO 2电还原催化剂提供了机会。

更新日期:2020-04-24
down
wechat
bug