Electrochemical Reduction of CO2 to Hydrocarbons with High Current Density in a CO2-Methanol Medium

Abstract

Abstract We reported that CO and methyl formate were the major products in the electrochemical reduction of highly concentrated CO2 in a CO2-methanol medium when tetrabutylammonium salts were used as supporting salts. Here we report that CO2 is reduced efficiently to hydrocarbons when tetraethylammonium perchlorate is used as the salt. CO2 reduction proceeds with a current efficiency of 89.7% at 1 A·cm−2, indicating sufficient mass-transfer of CO2 even at such a high current density.