pH-Regulated Copper and Indium Catalysts for CO₂ Electroreduction to C₂ Products

Abstract

Developing simple and efficient synthesis methods for electrocatalysts is the key to advancing the process of electrochemical CO2 reduction reaction (CO2RR). In this study, we employ the simple hydrothermal method and modulate the pH to prepare the CuO-In(OH)3 heterostructure catalyst. It is found that the prepared lamellar CuO-In(OH)3-12 hetero-composite catalyst accelerates the reaction kinetics, provides more active sites, and strengthens the electronic interaction between Cu and In. The obtained catalyst achieves a notable Faradaic efficiency of 40.26% for C2 products at a current density of 18.5 mA cm-2. This work provides a new approach for the development of hetero-catalysts under synthetic regulation methods and different metal combination selections.