Lee, Sang A. Lee, Jegon Oh, Seokjae Lee, Suyoun Bae, Jong-Seong Chegal, Won Diware, Mangesh S. Park, Sungkyun Chang, Seo Hyoung Choi, Taekjib Choi, Woo Seok 2024-01-19T19:02:44Z 2024-01-19T19:02:44Z 2021-09-05 2019-10-01 2398-4902 https://pubs.kist.re.kr/handle/201004/119476 Hybridization of orbitals determines the electronic structure of transition metal oxides and strongly influences the formation and breaking of chemical bonds necessary for electrocatalytic activity. However, the exact relation between p-d hybridization and electrocatalytic activity is yet to be elucidated due to the lack of selective controllability over hybridization. Here, the electronic structure and electrocatalytic behavior of epitaxial CaRuO3 thin films are studied, to clarify the correlation between hybridization and the oxygen evolution reaction. A decreased hybridization strength between Ru 4d and O 2p states leads to a significant enhancement in the oxygen evolution reaction. A strong hybridization within the CaRuO3 thin film is found to hinder the formation of chemical bonds between the transition metal and adsorbate molecules, thereby decreasing the electrocatalytic efficiency. Our study provides a rigorous correlation between the electrocatalytic activity and electronic structure, taking advantage of the selective hybridization strength control offered by the CaRuO3 system. English ROYAL SOC CHEMISTRY TRANSITION-METAL OXIDES ELECTRONIC-STRUCTURE PEROVSKITE CATALYSTS SRRUO3 DESIGN REDOX ELECTROCATALYSIS SEGREGATION STABILITY Correlation between Ru-O hybridization and the oxygen evolution reaction in ruthenate epitaxial thin films Article 10.1039/c9se00441f 1 SUSTAINABLE ENERGY & FUELS, v.3, no.10, pp.2867 - 2872 SUSTAINABLE ENERGY & FUELS 3 10 2867 2872 scie scopus 000487670300031 2-s2.0-85072630355 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article TRANSITION-METAL OXIDES ELECTRONIC-STRUCTURE PEROVSKITE CATALYSTS SRRUO3 DESIGN REDOX ELECTROCATALYSIS SEGREGATION STABILITY