Kwak, Inhye Kwon, Ik Seon Kim, Jundong Park, Kidong Ahn, Jae-Pyoung Yoo, Seung Jo Kim, Jin-Gyu Park, Jeunghee 2024-01-20T01:02:38Z 2024-01-20T01:02:38Z 2021-09-05 2017-07-13 1932-7447 https://pubs.kist.re.kr/handle/201004/122525 Development of high-performance catalysts is very crucial for the commercialization of sustainable energy conversion technologies. Searching for stable, highly active, and low-cost multifunctional catalysts has become a critical issue. In this study, we report the synthesis of IrO2-ZnO hybrid nanoparticles and their highly efficient electrocatalytic. activities toward oxygen/hydrogen evolution reaction (OER/HER) as well as oxygen reduction reaction (ORR). For comparison, we synthesized RuO2-ZnO, showing a smaller catalytic activity than IrO2-ZnO, which provides robust evidence for the unique synergic effect of these hybrid structures. IrO2-ZnO and RuO2-ZnO exhibit excellent OER catalytic performance with Tafel slopes of 57 and 59 mV decade(-1), respectively. For HER, IrO2-ZnO shows a higher catalytic activity than RuO2-ZnO. The numbers of electrons involved in the ORR were 3,7 and 2.8, respectively, for IrO2-ZnO and RuO2-ZnO. The remarkable catalytic performance of IrO2-ZnO would be ascribed to the abundant oxygen vacancies and the metallic states of Ir, which ensure excellent catalytic activity and stability. English American Chemical Society OXYGEN EVOLUTION REACTION BIFUNCTIONAL ELECTROCATALYST REDUCTION REACTION CARBON CATALYSTS OXIDES IR DESIGN RU IrO2-ZnO Hybrid Nanoparticles as Highly Efficient Trifunctional Electrocatalysts Article 10.1021/acs.jpcc.7b03844 1 The Journal of Physical Chemistry C, v.121, no.27, pp.14899 - 14906 The Journal of Physical Chemistry C 121 27 14899 14906 scie scopus 000405761600058 2-s2.0-85024388657 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article OXYGEN EVOLUTION REACTION BIFUNCTIONAL ELECTROCATALYST REDUCTION REACTION CARBON CATALYSTS OXIDES IR DESIGN RU electrocatalyst nanoparticles ORR current density