Lee, Sang A. Oh, Seokjae Hwang, Jae-Yeol Choi, Minseok Youn, Chulmin Kim, Ji Woong Chang, Seo Hyoung Woo, Sungmin Bae, Jong-Seong Park, Sungkyun Kim, Young-Min Lee, Suyoun Choi, Taekjib Kim, Sung Wng Choi, Woo Seok 2024-01-20T02:00:50Z 2024-01-20T02:00:50Z 2021-09-01 2017-04 1754-5692 https://pubs.kist.re.kr/handle/201004/122915 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. English Royal Society of Chemistry Enhanced electrocatalytic activity via phase transitions in strongly correlated SrRuO3 thin films Article 10.1039/c7ee00628d 1 Energy & Environmental Science, v.10, no.4, pp.924 - 930 Energy & Environmental Science 10 4 924 930 N scie scopus 000398909900010 2-s2.0-85019742781 Chemistry, Multidisciplinary Energy & Fuels Engineering, Chemical Environmental Sciences Chemistry Energy & Fuels Engineering Environmental Sciences & Ecology Article OXYGEN EVOLUTION REACTION METAL-AIR BATTERIES OXIDE SURFACES CATALYSTS WATER SPECTROSCOPY ELECTROLYSIS PEROVSKITES PRINCIPLES STABILITY