Synthesis of Sn4P3/Reduced Graphene Oxide Nanocomposites as Highly Efficient Electrocatalysts for CO2 Reduction

Sn4P3/reduced graphene oxide nanocomposites exhibited high selectivity for CO over a wide potential range from -2.2 V to -2.5 V vs. Ag/Ag+. The maximum Faradaic efficiency for CO can reach 96.6 % with a high current density of 68.0 mA cm-2. The high efficiency and selectivity can be attributed to the modified electronic structure of Sn sites, the small Sn4P3 nanoparticles and their dense packing in a conductive matrix, leading to a high density of active sites for adsorbing CO2 and stabilizing CO2•− intermediate.