Highly selective reduction of CO2 to HCOOH by a ZnO/SnO2 electrocatalyst with heterogeneous interfaces

ZnO/SnO 2 was designed and prepared for highly selective CO 2 reduction for HCOOH. A faraday efficiency (FE) of 93.8% and a yield of 0.16 mmol h −1 cm −2 were obtained at the potential of −1.05 V.