Constructing Cu0/Cu+ interface on copper foils to boost electrochemical CO2 reduction to ethylene

Abstract

Scalable conversion of CO₂ to C₂₊ products at high faradaic efficiency (FE) is essential for advancing industrial CO₂ valorization, but remains constrained by the difficulties in fabricating large-size electrodes. Herein, we facilely prepared a CuCl–Cu electrode with precise dimensional controllability and easy scalability, presenting a high FE_C2H4 of 65.11% at a current density of −300 mA cm⁻².