Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)
Publication date: 28th August 2024
Copper|oxide materials are emerging as promising catalysts for the electrochemical CO2 reduction reaction (CO2RR) for selectivity towards multicarbon products, including alcohols[1,2], and stability under operations has been reported for some of them[3]. However, design rules linking oxide properties and catalyst behavior are currently lacking.
Herein, we propose a framework to map correlations between the electrochemical behavior of the oxide, the reactivity and the stability of copper|oxide catalysts in CO2RR. Specifically, we use well-defined Cu-MOx nanoparticles to investigate and compare the behavior of Cu-ZrOx, Cu-MgOx, Cu-TiOx. By tracking the speciation and morphological evolution of these model catalyst materials, we find that the cathodic stability of the formed interfaces is determined by the operating potential, by phase stability of the pure oxides and by their interaction with copper. The interplay between these factors shapes the restructuring pathways for Cu-MOx catalysts and eventually drives their selectivity in CO2RR. The developed understanding aids the design of catalytic materials for more efficient and more stable CO2RR and, beyond, for other electroreduction reactions.
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