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Control of transition metal–oxygen bond strength boosts the redox ex-solution in a perovskite oxide surface

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Abstract

We demonstrate theoretically and experimentally that engineering of cation–oxygen bond strength in a perovskite structure can control redox ex-solution of B-site metals and thus the formation of metal nanoparticles at the oxide surface upon high-temperature reduction. In particular, we show that large isovalent doping significantly promotes the B-site ex-solution via tuning of the cation–oxygen bond strength, leading to high catalytic activity of CO oxidation. This method to promote ex-solution can be readily applied to various heterogeneous catalysts.

Graphical abstract: Control of transition metal–oxygen bond strength boosts the redox ex-solution in a perovskite oxide surface

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Article information


Submitted
19 Feb 2020
Accepted
02 Jun 2020
First published
02 Jun 2020

Energy Environ. Sci., 2020, Advance Article
Article type
Communication

Control of transition metal–oxygen bond strength boosts the redox ex-solution in a perovskite oxide surface

K. Kim, B. Koo, Y. Jo, S. Lee, J. K. Kim, B. Kim, W. Jung and J. W. Han, Energy Environ. Sci., 2020, Advance Article , DOI: 10.1039/D0EE01308K

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