Acidic chloride electrolyte mediates the high conversion ratio of CO2-to-C2H4 and direct production of Cl2

We design an efficient catalytic system for C 2 and Cl 2 formation by coupling CO 2 R and CER in an acidic environment. It can support C 2 H 4 and Cl 2 with 63% and 89% FEs at 700 mA cm −2 . This provides a valuable reference for the development of the CO 2 RR.