Issue 10, 2020

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

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

Supplementary files

Article information

Article type
Communication
Submitted
19 ፌብሩ 2020
Accepted
02 ጁን 2020
First published
02 ጁን 2020

Energy Environ. Sci., 2020,13, 3404-3411

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, 13, 3404 DOI: 10.1039/D0EE01308K

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