Structure and Catalytic Property Relationship of Core-Shell Metal Nanoparticles

获得伊利诺伊大学香槟分校化学催化项目的这一奖项后，伊利诺伊大学香槟分校的洪彦教授将开发新的多相金属催化剂，并对其在氧气还原反应(ORR)和主要生物质副产物的化学转化中的高性能结构来源有基本的理解。具体目标是：1)研究M@Pt(core@Shell)颗粒-颗粒-颗粒非均相纳米结构的制备和精细纳米结构；2)M@PT或M@PTM催化剂在ORR中的结构与催化性能关系的研究；3)多面型多金属铂纳米晶催化剂的设计、合成及ORR催化性能；4)丙三醇在铂基核壳多相催化剂上的热化学转化。将考察核-壳、非均相纳米结构的制备、原子能级表征和结构-催化性能关系。将仔细研究特殊的结构问题，如小平面和表面扭曲对催化性能的影响。使用氢和生物燃料等替代能源的新生产技术在很大程度上依赖于新一代先进催化剂的开发，以促进和加速反应，使用比传统系统更少的能源。该项目将通过设计和了解新的双金属纳米结构直接解决这一技术挑战。它还将作为一个培训平台，供各级和具有不同社会、经济背景的学生成为能够在利用新的可持续能源方面进行终身研究的科学家。在这项工作中获得的知识将通过科学出版物、会议报告和网络媒体迅速传播。

With this award from the Chemical Catalysis Program of the Chemistry Division Professor Hong Yan of the University of Illinois at Urbana-Champaign will develop new heterogeneous, metallic catalysts as well as fundamental understanding of the structural origins of their high performance in oxygen reduction reactions (ORR) and in chemical conversion of major by-products from biomass. Specifics aims are: 1) study of the preparation and fine nanostructures of M@Pt (core@shell) particle-on-particle heterogeneous nanostructures; 2) study of the structure and catalytic property relationship of M@Pt or M@PtM catalysts in ORR; 3) design, synthesis and ORR catalytic property of faceted heterogeneous Pt multimetallic nanocrystal catalysts; and 4) thermal chemical conversion of glycerol using on Pt-based core-shell heterogeneous catalysts. Preparation, atomic level characterization and structure-catalytic property relation of core-shell, heterogeneous nanostructures will be examined. Effect of particular structural issues such as facet and surface distortion on catalytic performance will be carefully studied. New production technologies using alternative energy sources, including hydrogen and biofuel, heavily depend on the development of new generation of advanced catalysts to facilitate and accelerate reactions using less energy than conventional systems. This project will directly address this technological challenge through the design and understanding of new bimetallic nanostructures. It will also serve as a training platform for students at all levels and with different social, economic backgrounds to become able scientists to carry out life-long research in the utilization of new sustainable energy sources. The knowledge gained during this work will be rapidly disseminated through scientific publications, conference presentations and web-based media.