Nanocavity enriched CuPd alloy with high selectivity for CO2 electroreduction toward C2H4

Electrocatalysis of CO2 reduction reaction is an effective way to convert CO2 into high value-added products, but the selectivity of Cu-based catalysts for C2+ products needs to be improved due to the high energy barrier of C–C coupling. Therefore, a viable catalyst design strategy to decrease energy barrier of C–C coupling should be put forward. Here, a nanocavity-enriched CuPd single atom alloy (CuPd SAA) catalyst is designed to promote C–C coupling process. The faradaic efficiency of CuPd SAA for ethylene and C2+ reaches 75.6