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제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Catalytic oxygen reduction by different linked Graphene-Metal nanoparticles modified GCE in acidic solution

등록일
2012년 2월 15일 09시 53분 30초
접수번호
0374
발표코드
ELEC.P-1228 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
전기화학
저자 및
공동저자
김대근, Mohammad Shamsuddin, 전승원
전남대학교 화학과, Korea
We have reported four different linkers containing Graphene Oxide (GO) supported platinum (Pt) nanoparticles (NPs) catalysts that synthesized using a chemical method and employed an experimental characterization towards oxygen reduction reaction (ORR) in 0.5 M H2SO4 solution acidic media. GO-Pt was characterized by X-ray photoelectron spectroscopy (XPS) transmission electron microscopy (TEM) and Energy-dispersive X-ray spectroscopy (EDX). The results showed that the attachment of Pt onto GO surface was successful. To investigate the relationships between the linker length and the catalytic activities of metal-decorated GO. Three samples were prepared with different linker molecules. Viz. HS(CH2)2SH, HS(CH2)3SH and HS(CH2)4SH. three different types of GO-Pt catalysts were characterized using electrochemical techniques such as cyclic voltammetry (CV), as well as rotating ring disk electrode (RRDE) to analyze the quantitatively obtain the ORR kinetic and the reaction mechanisms on glassy carbon electrode (GCE). All GO-Pt/GCE electrodes showed significantly improved ORR activity and different ORR mechanisms. GO-Pt catalyst assigned to sites catalytically active towards the ORR, resulting in activity enhancement and a mechanism of a four-electron dominant reduction process.

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