澳门大学潘晖教授做客第275期化苑讲坛

报告题目：2D Monolayers: Promising Materials for Versatile Applications

报 告 人 ：潘晖教授

报告时间：2017年8月4日（周五）上午9:30

报告地点：东校区能量转换与存储材料化学教育部重点实验室二楼会议室(韵苑28栋F)

报告人简介：

Dr. Hui Pan is an associate professor in the Institute of Applied Physics and Materials Engineering at the University of Macau. He obtained his Bachelor Degree from Xidian University in 1997 and PhD in physics from National University of Singapore in 2006, respectively. He had been a research fellow in National University of Singapore from 2006 to 2008, and a postdoctoral fellow in Oak Ridge National Laboratory from 2008 to 2009, and Senior Scientist in the Institute of High Performance Computing (Singapore) from 2009 to 2013. Dr. Pan joined in the University of Macau in 2013. In his research, a combined computational and experimental method is used to study the physical and chemical properties of nanostructures and thin film for their applications in solar energy harvesting, electrical energy storage, hydrogen production/storage, fuel cell and electronic devices, spintronics, nanodevices, and catalysts in my research work. Dr. Pan had published more than 110 SCI papers and 5 book chapters, and filed 4 USA patents. The total SCI citation is more than 3730. His h-index is 31.

报告内容：

    Two-dimensional (2D) nanostructures, such as graphene, transition metal dichalcogenides monolayer, and MXenes, have attracted increasing attention because of their unusual physical and chemical properties. In this talk, we will discuss on our research on these 2D MLs. First, a systematical study on the physical and chemical properties of 2D MX₂ (M = transition metal; X=S, Se, and Xe) monolayers and the effects of hydrogenation and strain is presented on the basis of first-principles calculations. For example, by combining hydrogenation with external tension, we found that the magnetic properties of MoS₂ monolayer can be tuned from non-magnetism, to ferromagnetism, and further to non-magnetism with the increase of tension. We also found that metal disulfide monolayers show better catalytic performance on hydrogen production than other metal dichalcogenides. Secondly, we will present a DFT-study on the physical and chemical properties of 2D MXenes, including metal carbide, nitrides and phosphides, for their applications in Li battery and electrolysis of water. For example, we investigate the formation possibilities of 2D metal phosphides by exploring their phonon dispersion and thermodynamic stability, and find that 2D metal phosphides can be achieved. Finally, I will report our DFT-study on waved graphene, including its physical and chemical properties, molecule adsorption, and catalytic activity in oxygen reduction reactions (ORR). It is believed that these 2D monolayers may apply to mechanical valve, sensor, spintronics, and electrocatalysis