Constructing Cu0/Cu+ interfaces on copper foil to boost electrochemical CO2 reduction to ethylene

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 FEC2H4 of 65.11% at a current density of -300 mA cm-2.