Production of Co and Ch4 in Electrochemical Reduction of Co2 at Metal Electrodes in Aqueous Hydrogencarbonate Solution

Abstract The total analysis of gaseous and soluble products was carried out in the electrochemical reduction of CO2 (current density 5 mA cm−2) on various electrode metals. HCOO− was predominantly produced at Cd, In, Sn, and Pb cathodes. Ag and Au principally gave CO. CH4 was formed in an appreciable amount at Cu cathode.