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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Supported Core-Shell Electrocatalysts for Fuel Cells; Close Encounter with Reality

등록일
2012년 2월 23일 15시 12분 00초
접수번호
1446
발표코드
MAT.P-1196 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
황승준
한국과학기술연구원 연료전지센터, Korea
In this study, we screened the most probable core-shell combination by using computational method and then devised a facile synthetic route for synthesizing the proposed core-shell structure. Finally, we characterized the fuel cell performance and durability in a single cell level. Firstly, in order to fine the most probable core-shell combinations for ORR reaction, we performed density functional theory (DFT) calculations. Two simple descriptors were used for screening. One is oxygen adsorption energy on Pt-shell as a measure of reactivity.The other is vacancy formation energy of Pt in Pt-shell as a criterion for stability.Especially, the searching process has been focused on finding a stable core-shell combinations since durability of nano-catalysts is crucial to commercialize for fuel cell applications. According to the simulation, PdCu@Pt core-shell was predicted to show superior reactivity and stability. This combination was expected to reduce the adsorption energy of oxygen on Pt shell, which is believed to show better reactivity.The charge accumulation between Pt and PdCu interface enhanced the bonding strength of PdCu and Pt interface, which stabilizes Pt shell. Two simple descriptors used in this study can be extended to find another core-shell combination for ORR reaction before synthesizing core-shell nanocatalysts.

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