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학술발표회초록보기

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제105회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Increased Oxygen Coverage Pt–M (M= Fe, Co, and Sn) Alloy Cathode for the Enhanced Oxygen Reduction Reaction

등록일
2010년 2월 24일 16시 30분 36초
접수번호
1338
발표코드
39P315포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
양대수, 유종성
고려대학교 신소재화학과, Korea
A simple and efficient approach has been developed for synthesis of carbon-supported Pt–M (M= Fe, Co, and Sn) nanoparticles (NPs) that combines homogeneous deposition (HD) of Pt complex species through a gradual increase of pH realized by in situ hydrolysis of urea and subsequent uniform reduction by ethylene glycol (EG) in a polyol process, giving control over the size and dispersion of Pt–M (M= Fe, Co, and Sn) NPs. Three catalysts with a similar Pt:M atomic ratio, Pt–Fe (50:50), Pt–Co (50:50), and Pt–Ni (50:50), were prepared for the investigation of Oxygen Reduction Reaction(ORR). The excellent electrocatalysis ability of the Pt–M (M= Fe, Co, and Sn) catalysts produced by HD-EG is demonstrated through the etermination of electrochemical surface area and fuel-cell polarization performance. A high metal loading catalyst such as Pt–M (60 wt %)/VC fabricated by the HD-EG method outperforms ones with mid-to-low metal loadings (i.e., 40 and 20 wt %), even at a very low catalyst loading of 0.2 mg of Pt–M cm-2 at the cathode, which is for the first time reported for the VC-supported Pt catalysts.

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