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  • 09월 20일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제126회 대한화학회 학술발표회 및 총회 Cobalt-Antimony Oxide for Oxygen Evolution Reaction in Anion Exchange Membrane Water Splitting

2020년 9월 3일 16시 56분 50초
ENVR.P-549 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 21일(수) 17:00~17:30
Environmental Energy
저자 및
Kahyun Ham, Jaeyoung Lee1,*
School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Korea
1School of Earth Sciences and Environmental Enginee, Gwangju Institute of Science and Technology, Korea
Electrochemical water splitting is the one of the promising ways to obtain hydrogen from aqueous media. Oxygen evolution reaction (OER) at the anode is the rate-determining step due to the sluggish kinetics, which leads to reducing energy efficiency. Recently, anion exchange membrane water splitting has been considered as an alternative way because of its capability of producing hydrogen of high purity and the availability of iron-triad element-based catalysts because of their thermodynamically stability in alkaline media. Besides, cobalt oxides such as spinel, layered double hydroxide are being investigated as active OER electrocatalyst. Among them, the spinel-type Co3O4, which contains one Co2+ in the tetrahedral site and two Co3+ ions in the octahedral site, exhibits outstanding OER performance in alkaline media and has been actively investigated. In this study, we investigated cobalt-antimony oxide as OER catalyst in alkaline media, which has unique crystal structure and contains abundant octahedral Co2+ compared to spinel-type cobalt oxide. We aimed at identifying the role of octahedral Co2+ of cobalt-antimony oxide by using in-situ X-ray absorption near-edge structure analysis. We also carried out anion exchange membrane water splitting to confirm the availability as the anode catalyst to produce H2 gas.