深圳大学西丽校区

学术讲座

【化学与环境工程学院】学术讲座(三十):Design and Synthesis of High Performance Catalysts

2019年05月17日

Design and Synthesis of High Performance Catalysts

主讲人: Professor Zhichuan J. Xu

     Professor Gengfeng Zheng

   Professor Wei  Xing   

   Professor Dehui Deng

时间: 2019518上午9:00

地点: 深圳大学西丽校区B1-420会议室

 

报告简介:

Exploring efficient and low cost oxygen electrocatalysts for ORR  and OER is critical for developing renewable energy technologies like fuel  cells, metal-air batteries, and water electrolyzers. This presentation will  presents a systematic study on oxygen electrocatalysis (ORR and OER) of  transition metal spinel oxides. Starting with a model system of Mn-Co spinel,  the presentation will introduce the correlation of oxygen catalytic activities  of these oxides and their intrinsic chemical properties. The catalytic activity  was measured by rotating disk technique and the intrinsic chemical properties  were probed by synchrotron X-ray absorption techniques. It was found that  molecular orbital theory is able to well-explain their activities. The attention  was further extended from cubic Mn-Co spinels to tetragonal Mn-Co spinels and it  was found that the molecular theory is again dominant in determining the  catalytic activies. This mechanistic principle is further applied to explain the  ORR/OER activities of other spinels containing other transition metals (Fe, Ni,  Zn, Li, and etc.). The talk further gives insight on surface reconstruction on  spinel oxides and how the bulk properties affect such reconstruction during  OER.

欢迎有兴趣的师生参加!