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

Electrochemical CO 2 conversion to value-added multicarbon (C 2+ ) chemicals holds promise for reducing CO 2 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 3 (p-CuSiO 3 /CuO) to maximize the active interface sites, enabling efficient CO 2 reduction to C 2+ products. Significantly, the p-CuSiO 3 /CuO catalyst exhibits impressive C 2+ Faradaic efficiency (FE) of 77.8% in an H-cell at -1.2 V versus reversible hydrogen electrode (RHE) in 0.1 M KHCO 3 and remarkable C 2 H 4 and C 2+ FEs of 82.0% and 91.7% in a flow cell at a current density of 400 mA cm -2 in 1 M KOH. In situ characterizations and theoretical calculations reveal that the active interfaces facilitate CO 2 activation and lower the formation energy of the key intermediate *OCCOH, thus promoting CO 2 conversion to C 2+ . This work provides a rational design for steering the active sites toward C 2+ products. This article is protected by copyright. All rights reserved.