Im, Kyungmin Kim, Donghwi Jang, Jue-Hyuk Kim, Jinsoo Yoo, Sung Jong 2024-01-19T18:31:11Z 2024-01-19T18:31:11Z 2022-01-10 2020-01 0926-3373 https://pubs.kist.re.kr/handle/201004/119120 Metal nitrogen carbon (M-NC) catalysts have been reported as promising electrocatalysts to replace noble-metal catalysts (Pt/C, Au/C, Ru/C etc.) in many industrial processes. In this regard, carbonized zeolite imidazole frameworks (ZIFs), as precursors of M-NC catalysts, have been extensively studied because of their porosity and ligand composition containing nitrogen and carbon. In this study, we synthesize Co-doped ZnO@ZIF-8 particles from a Co-doped ZnO sphere via the spray pyrolysis method and pseudomorphic replication. Ultrasonic spray pyrolysis is an attractive approach to operate mass production with high-purity homogeneous structures. Further, pseudomorphic replication makes it possible to control the morphology of the metal organic framework (MOF) particles and easily prepare MOF composite particles. In the study, the pyrolyzed ZIF particles are applied to oxygen reduction reactions in alkaline media, and our results indicate that particles show a high half-wave potential of 0.904 V, which makes them suitable for diverse electrochemical applications. English ELSEVIER DOPED CARBON HIGHLY EFFICIENT NANOPARTICLES ELECTROCATALYSTS CATALYSTS GRAPHENE EVOLUTION MEMBRANES POWDERS MATRIX Hollow-sphere Co-NC synthesis by incorporation of ultrasonic spray pyrolysis and pseudomorphic replication and its enhanced activity toward oxygen reduction reaction Article 10.1016/j.apcatb.2019.118192 1 APPLIED CATALYSIS B-ENVIRONMENTAL, v.260 APPLIED CATALYSIS B-ENVIRONMENTAL 260 scie scopus 000496894300057 2-s2.0-85072693561 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article DOPED CARBON HIGHLY EFFICIENT NANOPARTICLES ELECTROCATALYSTS CATALYSTS GRAPHENE EVOLUTION MEMBRANES POWDERS MATRIX Hollow sphere Ultrasonic spray pyrolysis Pseudomorphic replication Oxygen reduction reaction Metal organic frameworks