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Issue 4, 2017
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Enhanced electrocatalytic activity via phase transitions in strongly correlated SrRuO3 thin films

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Abstract

Transition metal oxides have been extensively studied and utilized as efficient catalysts. However, the strongly correlated behavior which often results in intriguing emergent phenomena in these materials has been mostly overlooked in understanding the electrochemical activities. Here, we demonstrate a close correlation between the phase transitions and oxygen evolution reaction (OER) in strongly correlated SrRuO3. By systematically introducing Ru–O vacancies into the single-crystalline SrRuO3 epitaxial thin films, we induced a phase transition in crystalline symmetry which resulted in the corresponding modification of the electronic structure. The modified electronic structure significantly affects the electrochemical activities, so a 30% decrease in the overpotential for the OER activity was achieved. Our study suggests that a substantial enhancement in the OER activity can be realized even within single material systems, by rational design and engineering of their crystal and electronic structures.

Graphical abstract: Enhanced electrocatalytic activity via phase transitions in strongly correlated SrRuO3 thin films

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Article information


Submitted
06 Mar 2017
Accepted
24 Mar 2017
First published
24 Mar 2017

Energy Environ. Sci., 2017,10, 924-930
Article type
Communication

Enhanced electrocatalytic activity via phase transitions in strongly correlated SrRuO3 thin films

S. A. Lee, S. Oh, J. Hwang, M. Choi, C. Youn, J. W. Kim, S. H. Chang, S. Woo, J. Bae, S. Park, Y. Kim, S. Lee, T. Choi, S. W. Kim and W. S. Choi, Energy Environ. Sci., 2017, 10, 924
DOI: 10.1039/C7EE00628D

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