名师讲座
报告题目：Catalysis enabled by operando spectroscopy: from fundamental understanding to innovative materials
报告时间：2023-08-05 10:30
报 告 人：王峰 副教授
University College London
报告地点：化学楼234
转播地点：翔安校区能源材料大楼3号楼3402会议室，漳州校区生化主楼307教室
报告摘要：
Heterogeneous catalysis is of prominent importance for modern society. Yet the understanding of reaction mechanisms is still limited due to the complexity of surface catalytic systems and the lack of characterization methods to directly observe surface process under working conditions. In this talk, I will introduce new experimental designs to utilize synchrotron X-rays and X-ray free electron laser-based operando spectroscopy to identify active centres and rate determine steps, which leads to the development and synthesis of novel materials that have significantly improved catalytic performance. I will present recent method development in my group: (1) Determination of surface O and active species via DXANES technique; (2) Rate determination in half-reactions with quick time-resolved X-ray spectroscopy for identification of rate determining step in redox catalysis; (3) Measuring dynamics of elementary electron transfer from support to metal active site at fs to ps time scale, help to shoot the molecular movie of a single catalytic process. With these first-time observations, we have been able to develop new catalysts with 5-100 times better performances than those in existing reports for emission control, H2 production, and fuel cell applications. Our new operando X-ray methods have been used beyond catalysis to energy storage and conversion systems. Such innovation has great potential in wide engineering applications.
报告人简介：
Dr. Feng Ryan Wang is an associate professor at the chemical engineering department of UCL. He obtained his PhD in Chemistry at Peking University in 2012. He was an Alexander von Humboldt Research Fellow at the Max-Planck Institute für Kohlenforschung between 2013 and 2015. His research mainly focuses on materials development for emission control, waste treatment and energy storage systems towards circular economy. He has been awarded the Young Scientist Prize of the 16th International Congress of catalysis. He is now serving the EPSRC strategic advisory team on capital equipment, EPSRC high level group of National Research Facility and the Early Career Advisory Board of ChemCatChem and the net-zero committee of UK catalysis hub. Through those roles, he has influenced the government funding decisions in large facilities including Diamond II, ISIS II and UK XFEL.
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