Synergistic catalysis of CuO/In2O3 composites for highly selective electrochemical CO2 reduction to CO

Abstract

The development of low-cost, selective, and active catalysts for electrochemical CO₂ reduction (ECR) remains an ongoing challenge. Here, we demonstrate for the first time, efficient ECR by exploiting interaction of CuO and In₂O₃. The catalytic properties of the composite catalysts can be readily tuned by manipulation of the metal oxide composition and interface, enabling remarkably high CO₂-to-CO conversion with a CO faradaic efficiency of about 93.0% at −0.7 V versus reversible hydrogen electrode, outperforming many previously reported metal-based electrocatalysts.