Abstract
Electrochemical reduction of CO2 to ethylene using renewable electricity is an attractive approach for sustainable carbon recycling. In situ generation of defects in catalysts is found to be a promising method to guarantee high ethylene production from CO2 with high stability. In this study, copper nanowires are prepared in situ with a high density of defects for electrocatalytic CO2 reduction. These defects effectively improve C-C coupling, thus realizing a remarkable performance toward CO2 reduction to C2 products. The obtained copper nanowires showed a high selectivity of ∼79% for C2 products and >58% for C2H4. More importantly, a significantly wide potential window of 500 mV was realized for the selective production of C2H4 with FE(C2H4) >55%. Finally, in situ Raman spectroscopy revealed that Cu0 is the real reactive site for the electrocatalytic CO2 reduction reaction.
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