摘要
Developing a convenient method to endow bulk Cu-based electrode with high activity of electrocatalytic CO_(2)reduction reaction(CO_(2)RR)to multicarbon(C_(2+))products is desirable but challenging.Herein,for the first time,we report that mechanical polishing induces highly reactive Cu sites for selective C-C coupling in CO_(2)RR.We find that mechanical polishing could endow Cu foil with abundant nanocavity surface structure,which efficiently confines the carbonaceous intermediates to enhance the probability of C-C coupling reaction.By confining the carbonaceous intermediates with Cu nanocavity,the as-prepared electrode delivers a Faradaic efficiency toward C_(2+)products of 65.7%at-1.3 V vs.RHE,which is enhanced up to 1.7 folds compared with that of commercial Cu foil.This work provides a new method to enable Cu foil with high activity of CO_(2)RR to C_(2+)products.
基金
the financial supports from the National Natural Science Foundation of China(21988101,21890753 and 52142501)
the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(QYZDB-SSWJSC020)
the Strategic Priority Research Program of Chinese Academy of Sciences(XDB36030200)
the National Key Research and Development Program of China(2018YFA0703400)
the BP Alternative Energy International Limited。
