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Issue 2, 2021
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Mechanistic insights into the phase transition and metal ex-solution phenomena of Pr0.5Ba0.5Mn0.85Co0.15O3−δ from simple to layered perovskite under reducing conditions and enhanced catalytic activity

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Abstract

We use density functional theory calculations and in situ X-ray diffraction spectroscopy experiments on Co-doped Pr0.5Ba0.5MnO3−δ (PBMCO) to understand how the phase transition from PBMCO to layered PBMCO occurred. The role of Co dopants for both the phase transition and the ex-solution is also elucidated. It turns out that the selective formation of oxygen vacancies at the Pr layer plays a key role in the phase transition to layered perovskite. The ex-solved Co nanoparticles showed higher catalytic activity than the doped one for CO oxidation. These results can guide the design of highly-active perovskite-based redox catalysts.

Graphical abstract: Mechanistic insights into the phase transition and metal ex-solution phenomena of Pr0.5Ba0.5Mn0.85Co0.15O3−δ from simple to layered perovskite under reducing conditions and enhanced catalytic activity

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Article information


Submitted
07 Sep 2020
Accepted
03 Dec 2020
First published
07 Dec 2020

Energy Environ. Sci., 2021,14, 873-882
Article type
Communication

Mechanistic insights into the phase transition and metal ex-solution phenomena of Pr0.5Ba0.5Mn0.85Co0.15O3−δ from simple to layered perovskite under reducing conditions and enhanced catalytic activity

K. Kim, S. Joo, R. Huang, H. J. Kim, G. Kim and J. W. Han, Energy Environ. Sci., 2021, 14, 873
DOI: 10.1039/D0EE02875D

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