报 告 人：Hong Yang 教授(伊利诺伊大学厄巴纳―香槟分校，University of Illinois at Urbana-Champaign)
报告题目：New Advancement of Design of High Performance Catalysts and Electrocatalysts for Energy Storage and Conversions
High-performance catalysts for applications in fuel cell, battery, electrolyzer for water splitting, CO2 utilization and ammonia synthesis require careful design of nanostructures and surfaces that form through either direct production or post synthesis processing. The conventional impregnation method often does not have the level of control to meet various requirements, such as catalytic surface with controlled single atom position or sub-monolayer atoms. Approaches are being developed to address synthetic challenges in nanocrystal size, facet, composition and fine structures (e.g., site specific bimetallic catalysts). I will present our latest understandings on the design and post-synthesis treatment of several classes of metal alloy- catalysts. The focus of this presentation will be on a) ligand chemistry in the design and controlled synthesis of metal catalysts, b) in situ liquid transmission electron microscopy (LTEM) in the understanding of nucleation and growth of heterogeneous bimetallic nanoparticle catalysts, c) in-situ variable temperature environmental TEM (ETEM) study of structural dynamics of oxygen reduction reaction (ORR) catalysts, d) structure-property relationship and e) density functional theory (DFT) calculation in understanding the observed new phenomena.