Electronic Modulation at an Ag/La(OH)3 Crystalline-Amorphous Heterostructure Enables High-Efficiency CO2-to-CO Conversion

Abstract

The strategic design of heterostructured interfaces is a powerful avenue for optimizing electrocatalytic performance, yet leveraging crystalline-amorphous interactions for the CO₂ reduction reaction (CO₂RR) remains underexplored. Herein, an Ag/La(OH)₃ crystalline-amorphous heterostructure was constructed by a facile synthesis. This unique configuration induces strong electronic coupling, optimizing intermediate adsorption. The optimized catalyst achieves exceptional CO selectivity with a 97.6% Faradaic efficiency at -0.78 V. Furthermore, it enables a Zn-CO₂ battery with a 16.71 mW cm^-2 peak power density.