The Additional Effect of Transition Metals (Cu, Zn, Sn and Ag) in Palladium Electrocatalyst for CO2 Reduction Reaction

Abstract

It is important to investigate the electrochemical reduction reaction of CO2 on the catalytic selectivity dependence the materials because it might be guideline to create a co-catalyst of photocatalytic CO2 reduction. Widely studied electrocatalysts for electrochemical CO2 reduction are precious metals, such as Pd, Ag, and Au. It is known that precious metals can efficiently reduce the CO2 to carbon monoxide (CO) or formate (HCOO-). In particular, Pd nano-particles (Pd NPs) was proved as a unique electrocatalyst for CO2 reduction. HCOO- and CO generation for electrochemical reduction of CO2 on Pd NPs can be observed at low and high potential region, respectively. It should be believed that high selectivity towards CO formation can be realized by a formation of bimetallic compounds with transition metals in Pd structure.