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

Title
Enhanced electrocatalytic activity via phase transitions in strongly correlated SrRuO3 thin films
Authors
최택집김성웅최우석이수연이상아오석재황재열최민석윤철민김지웅장서형우성민배종성박성균김영민
Issue Date
2017-03
Publisher
Energy & environmental science
Citation
VOL 10, NO 4-930
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 a strongly correlated SrRuO3. By systematically introducing Ru‐ O vacancies into the single‐ crystalline SrRuO3 epitaxial thin films, we induced phase transition in crystalline symmetry which resulted in corresponding modification in the electronic structure. The modified electronic structure significantly affect 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.
URI
http://pubs.kist.re.kr/handle/201004/65528
ISSN
1754-5692
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KIST Publication > Article
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