Structure and Catalytic Property Relationship of Core-Shell Metal Nanoparticles

凭借化学部化学催化计划的这一奖项，伊利诺伊大学厄巴纳-香槟分校的Hong Yan教授将开发新的非均相金属催化剂，并对其在氧还原反应（ORR）和生物质主要副产物的化学转化中的高性能结构起源进行基本了解。 具体目标是：1）M@Pt（核@壳）粒子-粒子非均相纳米结构的制备和精细纳米结构的研究; 2）M@Pt或M@PtM催化剂的结构和在ORR中的催化性能关系的研究; 3）多面非均相Pt多金属催化剂的设计、合成和ORR催化性能; 4）基于Pt的核-壳非均相催化剂上甘油的热化学转化。 核-壳结构的异质纳米结构的制备、原子水平的表征以及结构与催化性能的关系将被研究。 特别是结构问题，如刻面和表面变形对催化性能的影响将被仔细研究。使用替代能源（包括氢和生物燃料）的新生产技术在很大程度上取决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理解新的纳米结构来直接解决这一技术挑战。它还将作为一个培训平台，为各级学生和不同的社会，经济背景，成为有能力的科学家进行终身研究，利用新的可持续能源。 在这项工作中获得的知识将通过科学出版物、会议介绍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.