Kim, Dongwon Voronova, Anastasiia Kim, Sol Kim, Jin Young Park, Hee-Young Jang, Jong Hyun Seo, Bora 2024-01-19T11:02:08Z 2024-01-19T11:02:08Z 2022-10-20 2022-10 2050-7488 https://pubs.kist.re.kr/handle/201004/114485 Hydrogen is a sustainable energy carrier that can be produced via water electrolysis (WE). However, the use of precious metals as anode catalysts increases the cell stack price and hinders the practical implementation. Therefore, MnO2 has been introduced as a catalytic support material to maximize the utilization of precious metals at a given loading. However, their oxygen evolution reaction (OER) activities remain unsatisfactory owing to lack of precise structural control. Here, Ru and F incorporation successfully modulates the electronic structure of MnO2 for application to proton exchange membrane water electrolysis (PEMWE). Optimization of the synthesis conditions produced a (Mn0.94Ru0.06)O-2:2.5F catalyst, which showed a high mass activity. X-ray spectroscopic and electrochemical characterizations revealed that the OER activity increased with the Mn3+/Mn4+ ratio and oxygen vacancies. In addition, practical applicability was demonstrated by applying (Mn0.94Ru0.06)O-2:2.5F as the anode catalyst in a PEMWE cell. English Royal Society of Chemistry Electronic structure modulation of MnO2 by Ru and F incorporation for efficient proton exchange membrane water electrolysis Article 10.1039/d2ta06066c 1 Journal of Materials Chemistry A, v.10, no.41, pp.21985 - 21994 Journal of Materials Chemistry A 10 41 21985 21994 N scie scopus 000863201400001 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article OXYGEN EVOLUTION REACTION MANGANESE OXIDES OXIDATION ELECTROCATALYSTS PERFORMANCE ALPHA-MNO2 CATALYSTS ANODES