文章来源： 发布日期: 2023-07-21
报告题目：Defect electrocatalysis and defective materials
报 告 人：姚向东 教授
邀 请 人：刘建国 教授
It is of great importance to construct active site with high intrinsic activity for a certain reaction. Followed by achieving high dense of such active sites into a catalyst, the overall activity can be significantly promoted. Defects on carbons can not only serve as active sites, especially by a series of modification for electronic and molecular structures, with high intrinsic activity, but also can provide a large number of sites for trapping various atomic metal species, achieving high density of active sites. In 2015, we firstly initiated the concept of defect mechanism for ORR, then expanded it to hydrogen evolution (HER) and oxygen evolution reactions (OER), gradually establishing the new research field of defect electrocatalysis in the following years. The defect can provide enormous advantages for trapping atomic metals such as Ni, Co, Fe as examples with different coordination, e.g. defective materials, to activate chemical reactions such as oxygen reduction, hydrogen and oxygen evolution reactions. The numbers of the active sites can be controlled by the precisely control of defect synthesis. This new strategy provides opportunities to develop catalysts with high activity and high stability. Accordingly, it should be a future research focus for next generation catalysts that the design of active site with high intrinsic activity and assembly of the active sites with precisely controllable numbers into a catalyst.
Dr Xiangdong Yao is a National Expert Professor for Energy Materials/Catalysis and the Founding Dean of School of Advanced Energy at Sun Yat-Sen University, China. He obtained his BEng at Northeastern University in 1989 and MEng at Northwestern Polytechnical University in 1992 respectively for Materials Science and Engineering. From 1992 to 2000, he was employed in Institute of Metal Research, Chinese Academy of Sciences as Research Associate (1992), Assistant Professor (1995) and Associate Professor (1998). In 2000, he came to The University of Queensland, Australia where he was granted the PhD degree in Materials Engineering in 2005, working on the computational modeling for microstructure formation in light metals. From November 2003, he joined the ARC Centre of Excellence for Functional Nanomaterials at The University of Queensland. Since November 2009, he relocated at Griffith University, Australia as an Associate Professor and the group leader of Advanced Energy Materials, and promoted to full Professor in late 2012. He joined Sun Yat-Sen University in mid-2022. Dr Yao’s current research focuses on Energy Materials and technology, especially the hydrogen energy and catalysis.