123rd General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Exhibition Hall 2
Time 4월 18일 (목요일) 11:00~12:30
Code ELEC.P-446
Subject Cobalt Oxide Nanocrystals for Electrochemical and Photoelectrochemical Water Splitting
Authors Hye Rin Choe, Ki min Nam*
Department of Chemistry, Pusan National University, Korea
Abstract Spontaneous phase transition of wurtzite-CoO to spinel-Co3O4 was progressed on various substrates in the presence of water, resulting in efficient chemical bonding between the Co3O4 and the substrate without binder material. The proficient interaction of Co3O4 with the conductive substrate was suitable for the electrochemical water oxidation reaction. Furthermore, the Co3O4 was deposited on a semiconductor (BiVO4 photoelectrode) via the phase transition of wurtzite-CoO to investigate the proficient integration of the electrocatalyst onto a photoelectrode. The BiVO4/Co3O4 composite improved photoelectrochemical water oxidation activity, due to the efficient and subsequent interaction between the BiVO4 and Co3O4. Based on the electrochemical and photoelectrochemical water oxidation results, the reported spontaneous phase transition of wurtzite-CoO to Co3O4 has great potential applications for electrochemical catalytic reactions.
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