主讲人: Professor Zhichuan J. Xu

       Professor Gengfeng Zheng

  Professor Wei Xing  

     ProfessorDehui Deng;

时间: 2019年5月18上午9:00

地点: 深圳大学西丽校区B1-420会议室

报告简介：

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

欢迎有兴趣的师生参加！