Efficient CO 2 Electroreduction to Multicarbon Products at Cusio 3 /Cuo Derived Interfaces In Ordered Pores.

Electrochemical CO conversion to value-added multicarbon (C ) chemicals holds promise for reducing CO emissions and advancing carbon neutrality. However, achieving both high conversion rate and selectivity remains challenging due to the limited active sites on catalysts for carbon-carbon (C-C) coupling. Herein, porous CuO is coated with amorphous CuSiO (p-CuSiO /CuO) to maximize the active interface sites, enabling efficient CO reduction to C products. Significantly, the p-CuSiO /CuO catalyst exhibits impressive C Faradaic efficiency (FE) of 77.8% in an H-cell at -1.2 V versus reversible hydrogen electrode (RHE) in 0.1 M KHCO and remarkable C H and C FEs of 82.0% and 91.7% in a flow cell at a current density of 400 mA cm in 1 M KOH. In situ characterizations and theoretical calculations reveal that the active interfaces facilitate CO activation and lower the formation energy of the key intermediate *OCCOH, thus promoting CO conversion to C . This work provides a rational design for steering the active sites toward C products. This article is protected by copyright. All rights reserved.