Hydrogen Generation from H2O/H2O2/MnMoO4 System

This study investigates the electrochemical reduction of CO2 facilitated by a Cu-X catalytic layer, exploring the mechanism underlying the reaction pathways. The objective is to delineate how the presence of halide ions affects the electron transfer and subsequent formation of reaction intermediates. Employing theoretical analysis supported by experimental observations, we detail the electron transfer processes involving X− (Br, Cl, I−) bonds, and the generation of formate radicals leading to the production of ethylene. The results demonstrate that stronger adsorption of halide anions to the electrode enhances CO2 retention, thereby improving the reduction current. Additionally, the research suggests that the competitive adsorption of halide anions inhibits proton adsorption, resulting in elevated hydrogen overvoltage. Such insights into the catalytic performance of the Cu-X system provide a foundation for optimizing electrochemical CO2 reduction processes, indicating that tailored halide interactions can significantly mitigate the over-potential required for efficient CO2 conversion. This work contributes to a deeper understanding of catalytic mechanisms that enhance the rate of reduction in carbon capture technologies.