Papers › Atom-by-atom design of metal oxide catalysts for the oxygen evolution reaction with...
Atom-by-atom design of metal oxide catalysts for the oxygen evolution reaction with machine learning
Jaclyn R. Lunger, Jessica Karaguesian, Hoje Chun, Jiayu Peng, Yitong Tseo, Chung Hsuan Shan, Byungchan Han, Yang Shao-Horn, Rafael Gomez-Bombarelli
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Green hydrogen production is crucial for a sustainable future, but current catalysts for the oxygen evolution reaction (OER) suffer from slow kinetics, despite many efforts to produce optimal designs, particularly through the calculation of descriptors for activity. In this study, we develop a dataset of density functional theory calculations of bulk and surface perovskite oxides, and adsorption energies of OER intermediates, which includes compositions up to quaternary and facets up to (555). We demonstrate that per-site properties of perovskite oxides such as Bader charge or band center can be tuned through element substitution and faceting, and develop a machine learning model that accurately predicts these properties directly from the local chemical environment. We leverage these per-site properties to identify promising perovskites with high theoretical OER activity. The identified design principles and promising new materials provide a roadmap for closing the gap between current artificial catalysts and biological enzymes.
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