Application of X-ray absorption in Catalysis

时间：2011年4月26日(星期二)  10：00 -11：00

地点：科学馆617会议室

报告人：Professor Yongfeng Hu   Ph.D.

Canadian Light Source，Staff Scientist

Area of Expertise

Synchrotron radiation; Soft X-ray beamlines and science; Instrumentation in spectroscopy; Solid state and surface chemistry; Photoelectron and photoabsorption spectroscopy; Material and environmental science; Atomic and molecular spectroscopy

Research Contributions

He concentrates on (i) development of synchrotron instrumentation (both beamlines and end stations) and (ii) application of synchrotron based technique to the study of electronic structure and its interplay with material properties and spectroscopy. Most of the recent applications focused on material and environmental research. Most significant contribution is to build and commission three beamlines at the synchrotron facilities in US and Canada, including the first operational beamline (PGM) at the CLS. I am currently responsible for a unique, medium energy beamline (SXRMB) that is ideal for study of transition metals and other environmentally important elements such S and P.

 Synchrotron instrumentation at the Canadian Light Source

Since 2003, He has been in charge of the implementation of the PGM beamline at the CLS. He was also involved with another soft X-ray beamline, the SGM. Both beamlines are now fully operational and have been very productive since 2005. Since 2008, He has taken over the implementation of the phase-II Soft X-Ray for Microanalysis Beamline (SXRMB) project. The SXRMB beamline is now open to general users with excellent performance. In addition to the beamline development, He has designed and built several photoelectron and photoabsorption end stations.

Application of x-ray absorption in material and environmental research: the characterization of local structure and electronic structure

Taking advantage of the intense and polarized X-rays, they have used the X-ray absorption near edge structures in studying the electronic properties and texture of nano-materials. Using the multi-element, multi-edge XANES, we have studied a wide range of samples using synchrotron based technique: materials; samples of environmental concern; and the organic light emitting materials.