Correlating the valence state of a Cu-based electrocatalyst for CO reduction to C.

In this study, a facile ligand-protected strategy for preparing Cu@CuO and CuO nanoparticles is presented. The electrocatalyst efficacy of the CuO variant, particularly for CO reduction to multi-carbon products (C), is significant, boasting faradaic efficiencies (FEs) surpassing 85% and a current density peak at 340 mA cm. This exceptional performance markedly exceeds that of the Cu@CuO electrocatalyst.