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제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Platinum Nanocrystals with Controlled Shapes for Electrocatalytic Reaction

등록일
2011년 8월 5일 14시 25분 33초
접수번호
1536
발표코드
Ⅳ-ELEC.P-311 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
전기화학
저자 및
공동저자
김청희, 양성은
연세대학교 화공생명공학과, Korea
Shape-controlled platinum nanocrystals have different surface atomic structure. For example, cubic nanoparticles have only (100) surfaces while octahedral or tetrahedral nanoparticles are fully bound by (111) surfaces. Cuboctahedral nanoparticles have both (100) and (111) surfaces. In addition, platinum nanocrystals can offer enhanced catalytic properties. Especially, dendritic shape has attracted interests for electrocatalytic application due to its considerable advantages of high surface area. Here, we synthesized cubic, cuboctahedra, and dendritic Pt nanoparticles and investigate the effect of shape on selectivity for electrocatalytic reaction. Furthermore, the dendritic Pt nanoparticles were tested for oxygen reduction reaction (ORR), their activity and durability were evaluated. These results were compared with commercial platinum catalysts (E-TEK). Pt dendrites had higher activity for oxygen reduction and better selectivity for the production of H2O than E-TEK catalyst. The durability was improved for the large dendrites compared to E-TEK catalyst.

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