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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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Publication details

The article was received on 06 Mar 2017, accepted on 24 Mar 2017 and first published on 24 Mar 2017


Article type: Communication
DOI: 10.1039/C7EE00628D
Energy Environ. Sci., 2017,10, 924-930

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    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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