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(六):Oxygen Electrocatalysis on Transition

2019年02月27日

Oxygen Electrocatalysis on Transition Metal Spinel  Oxides

主讲人: Prof. Zhichuan J. Xu

时间: 2019227日下午4:30

地点: 深圳大学西丽校区B1-420会议室

报告人简介:

Zhichuan is an associate professor in School of  Materials Science and Engineering, Nanyang Technological University. He received  his PhD degree in Electroanalytical Chemistry at 2008 and B.S. degree in  Chemistry at 2002 from Lanzhou University, China. His PhD training was received  in Lanzhou University (2002-2004), Institute of Physics, CAS (2004-2005), and  Brown University (2005-2007). Since 2007, he worked in State University of New  York at Binghamton as a Research Associate and from 2009 he worked in  Massachusetts Institute of Technology as a Postdoctoral Researcher. Dr. Xu is  member of International Society of Electrochemistry (ISE), The Electrochemistry  Society (ECS), and American Association for the Advancement of Science (AAAS).  He was awarded Fellow of Royal Society of Chemistry (FRSC) in Nov. 2017. He  served as a guest editor for the special issue ICEI2016 of Electrochimica Acta  and an associate editor for Nano-Micro Letters. He is also the development  editor for Current Opinion in Electrochemistry and the vice president of ECS  Singapore Section. Dr Xu is 2018 Highly Cited Researcher by Clarivate Analytics,  Web of Science. 

 

讲座摘要:

  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!