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학술발표회초록보기

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  • 09월 08일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Atomic Layer-by-Layer Deposition of Pt on Pd for Catalysts with Enhanced Activity toward Oxygen Reduction

등록일
2015년 9월 6일 14시 50분 04초
접수번호
1336
발표코드
INOR.O-4 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 10시 : 15분
발표형식
구두발표
발표분야
무기화학 - Oral Presentation for Young Inorganic Chemists
저자 및
공동저자
최상일
경북대학교 화학과, Korea

Platinum is a key catalyst used for the oxygen reduction reaction (ORR) in a proton-exchange membrane fuel cell (PEMFC). Despite its great performance in ORR, its high cost and low abundance in the earth have created a major barrier for the commercialization of PEMFCs. One of the effective strategies for reducing the Pt content while retaining the activity of a Pt-based catalyst is to deposit the Pt atoms as ultrathin skins of a few atomic layers thick on nanocrystals made of another metal. During deposition, however, the Pt atoms often take an island growth mode because of a strong bonding between Pt atoms. This presentation introduces a versatile route to the conformal deposition of Pt as uniform, ultrathin shells on Pd nanocrystals. By applying different shapes of Pd nanocrystals, we determined the final shape of Pd@Pt core-shell nanocrystals. Compared to a commercial Pt/C catalyst, the Pd@Pt core?shell nanocrystals with different shapes showed enhancements in activity and durability toward the ORR. Among the various shapes, the greatest enhancement could be achieved for icosahedral Pd@Pt nanocrystals.


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