Integrated "Two-in-One" Strategy for High-Rate Electrocatalytic CO Reduction to Formate.

The electrochemical CO reduction reaction (ECR) is a promising pathway to producing valuable chemicals and fuels. Despite extensive studies reported, improving CO adsorption for local CO enrichment or water dissociation to generate sufficient H* is still not enough to achieve industrial-relevant current densities. Herein, we report a "two-in-one" catalyst, defective Bi nanosheets modified by CrO (Bi-CrO), to simultaneously promote CO adsorption and water dissociation, thereby enhancing the activity and selectivity of ECR to formate.