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제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Sub-10nm Well-defined Pd-Pt Core-shell Nanoparticles with Enhanced Electrocatalytic Activity and Durability toward the Oxygen Reduction Reaction

등록일
2012년 2월 15일 13시 48분 47초
접수번호
0434
발표코드
INOR.P-161 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
최란, 박준택1, 한상우
KAIST 화학과, Korea
1한국기초과학지원연구원 원장실, Korea
The improvement of electrocatalytic activity toward oxygen reduction reaction (ORR) and durability of Pt-based catalyst with low Pt content is one of the important tasks to advance the performance of polymer electrolyte membrane fuel cells (PEMFCs). In this paper, we report on syntheses of sub-10 nm well-defined spherical Pd-Pt core-shell (Pd@Pt) nanoparticles (NPs) with various shell thicknesses and their electrochemical performances toward ORR as for cathode catalysts. Pd@Pt NPs were prepared by simple synthesis of in-situ heteroepitaxial growth of Pt on as-synthesized Pd NPs. As-prepared Pd@Pt NPs demonstrated the enhanced electrocatalytic activity toward ORR and improved durable stability compared to the commercial Pt catalyst. Moreover, a membrane electrode assembly (MEA) adopted Pd@Pt/C catalysts in a single PEMFC exhibited the nearly same performance to the commercial Pt/C catalyst in spite of its lower Pt content. From the results, as-synthesized Pd@Pt/C catalysts facilitate low-cost and high-efficient automotive application of fuel cell.

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