期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 10, 期 4, 页码 924-930出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ee00628d
关键词
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资金
- Basic Science Research Programs through the National Research Foundation of Korea (NRF) [NRF-2014R1A2A2A01006478, NRF-2016R1A6A3A11934867, NRF-2015R1C1A1A02037595, NRF-2015R1C1A1A01053163, NRF-2015R1D1A1A01058672, NRF-2014R1A1A006405]
- Korea Institute of Science and Technology (KIST) [2E25800]
- [IBS-R011-D1]
- Ministry of Science, ICT & Future Planning, Republic of Korea [2E25800] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2016R1A6A3A11934867] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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