Efficient electrocatalytic CO_(2)reduction to C_(2+)chemicals on internal porous copper

To improve the electrocatalytic conversion of carbon dioxide(CO_(2))into C_(2+)products(such as ethylene(C_(2)H_(4))and ethanol(CH_(3)CH_(2)OH),etc.)is of great importance,but remains challenging.Herein,we proposed a strategy that directs the C–C coupling pathway through enriching and confining the carbon monoxide(CO)intermediate to internal pores of Cu nanocubes,for electrocatalytic reduction of CO_(2)into C_(2+)chemicals.In H-type cell,the Faraday efficiency(FE)for ethylene and ethanol reaches 70.3%at−1.28 V versus the reversible hydrogen electrode(vs.RHE),with a current density of 47.9 mA·cm^(−2).In flow cell,the total current density is up to 340.3 mA·cm^(−2)at^(−2).38 V(vs.RHE)and the FE for C_(2+)products is 67.4%.Experimental and theoretical studies reveal that both the CO intermediate adsorption and C–C coupling reaction on such an internal porous catalyst are facilitated,thus improving CO_(2)-to-C_(2+)conversion efficiency.