Theoretical Optimization of Compositions of High-Entropy Oxides for the Oxygen Evolution Reaction**
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High-entropy oxides are oxides consisting of five or more metals incorporated in a single lattice, and the large composition space suggests that properties of interest can be readily optimised. For applications within catalysis, the different local atomic environments result in a distribution of binding energies for the catalytic intermediates. Using the oxygen evolution reaction on the rutile (110) surface as example, here we outline a strategy for the theoretical optimization of the composition. Density functional theory calculations performed for a limited number of sites are used to fit a model that predicts the reaction energies for all possible local atomic environments. Two reaction pathways are considered; the conventional pathway on the coordinatively unsaturated sites and an alternative pathway involving transfer of protons to a bridging oxygen. An explicit model of the surface is constructed to describe the interdependency of the two pathways and identify the composition that maximizes catalytic activity.
Originalsprog | Engelsk |
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Artikelnummer | e202201146 |
Tidsskrift | Angewandte Chemie - International Edition |
Vol/bind | 61 |
Udgave nummer | 19 |
Antal sider | 7 |
ISSN | 1433-7851 |
DOI | |
Status | Udgivet - 2022 |
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© 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH
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