| Time：1111214 (Wed.) 14:20~16:20 Speaker：Prof.董崇禮(Chung-Li Dong) 淡江大學物理學系/Department of physics, Tamkang University Title：Advantages, challenges and opportunities of in situ X-ray absorption spectroscopy on energy materials Abstract：The materials scientists are devoted to searching for sustainable and clean energy in response to the global surge in demand for energy. It has never been easy to be green without developing advanced renewable energy materials. We have to approach the zero-emission future from different angles. The universal emphasis on energy is to develop advanced functional materials for more efficient energy conversion, storage, and conservation. The concepts to improve the energy conversion, storage or conservation efficiency of current energy materials are simple and clear, but are always much technically challenging. Most of the physical and chemical properties of a material is closely related to its unique atomic and electronic structures. Hence, without knowing the fundamental atomic and electronic structures, and particularly how they response in its working condition, it is difficult to better engineer the materials in an efficient way for a practical use with a greater performance. Synchrotron x-ray spectroscopies, including x-ray absorption and x-ray emission spectroscopies are powerful tools to study the local unoccupied and occupied electronic states. Moreover, utilization of the in situ technique that gives us the opportunity to track the modulations of atomic and electronic structures of the energy material at work. The emerging x-ray spectro-microscopic approach, scanning transmission x-ray microscopy providing the spatially resolved x-ray spectroscopy, is also gearing up for energy science. This presentation will report the significances of using x-ray spectroscopies for atomic and electronic structure characterizations of several important energy material systems, such as artificial photosynthesis materials, advanced nanocatalysts, and smart materials. Emerging characterization tool, recent progress of in situ technique development, a number of recent studies and Tamkang University (TKU) end-stations recently constructed at the Taiwan Photon Source (TPS) 45A & 27A beamlines for energy science will also be presented. Place：S101, Gongguan Campus, NTNU |
