Publication date: 28th August 2024
The conversion of CO2 via electrochemical processes is a promising technology to close the carbon cycle, especially when combined with renewable energy sources. Given their high market value and energy density, significant efforts are currently dedicated to designing copper (Cu)-based catalysts for converting CO2 into multicarbon molecules. By integrating concepts from molecular catalysts, the engineering of Cu-based catalysts aims to finely tailor the behavior of active sites on metallic surfaces, which remains a long-standing interest for the controlled design of novel electrocatalytic materials. In this context, we have recently explored strategies to enhance the conversion of CO2 into hydrocarbon molecules with two or more carbon atoms (C2+) via molecular doping or metal alloying.
Despite impressive progress achieved through the development of flow cells with improved gas/liquid/solid interfaces, the realistic development of CO2 electrolyzers is still hindered by several fundamental challenges. These include understanding the local microenvironment, reducing the large operating voltage, and improving CO2 utilization efficiency.
In my presentation, I will review our recent progress in understanding and controlling the interface at various levels within CO2 electrolyzers, from the molecular scale to the complete electrolysis system.
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