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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Nanospace-Confined High-Temperature Solid-State Reactions: Versatile Synthetic Route for High-Diversity Pool of Catalytic Nanocrystals

2018년 2월 13일 15시 07분 21초
MAT.P-545 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 20일 (금요일) 11:00~12:30
Material Chemistry
저자 및
Jung Hun Koo, Yu Rim Kim, In Su Lee*
Department of Chemistry, Pohang University of Science and Technology, Korea

This study proposes a methodology to extend the utility of solid-state reactions to a synthetic route for producing a high-diversity pool of catalytic nanocrystals (NCs) by circumventing the problematic sintering of NCs at high-temperatures. For this purpose, nanometer-scale-confined NC formations/transformations were investigated using specifically designed nanometer-sized SiO2 medium with a radially differentiated core, which hinders the outward diffusion of fast moving reactants and tiny intermediates and confines the entire evolution process of single crystalline NCs (Pd, first-row-transition-metals, and their alloys) within a few-tens-nanometer-sized space. The variability of the product could be enhanced by subsequent thermal conversion of alloy- into hybrid-NCs with heterojunction interfaces. The evolution process of alloy-NCs could be examined under nanoscale confinement in the rarely explored high-temperature and solid-state environments. Further, the comparative investigation of the acquired pool of Pd-based catalytic NCs allowed us to find the most optimized one with the highest performance in CO oxidation reaction.