Hollow-sphere Co-NC synthesis by incorporation of ultrasonic spray pyrolysis and pseudomorphic replication and its enhanced activity toward oxygen redcution reaction

Title
Hollow-sphere Co-NC synthesis by incorporation of ultrasonic spray pyrolysis and pseudomorphic replication and its enhanced activity toward oxygen redcution reaction
Authors
유성종장주혁임경민김동휘김진수
Issue Date
2020-01
Publisher
Applied catalysis B, Environmental
Citation
VOL 260, 118192
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/72056
ISSN
0926-3373
Appears in Collections:
KIST Publication > Article
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