报告题目：Understanding and Engineering Well-Defined Materials for Energy and Environmental Applications
报 告 人：Weixin Huang
报告时间：2023年6月9日上午10：30
报告地点：逸夫楼二楼学术报告厅
报告人简介：
Huang received his Ph.D. in Chemistry from the University of Notre Dame in 2017 under the supervision of Prof. Sylwia Ptasinska and Prof. Ian Carmichael. His thesis focused on the surface evolution of perovskite materials under gas environments using ambient pressure–X-ray photoelectron spectroscopy (AP-XPS). He was awarded the Chinese Government Award for Outstanding Self-financed Students Abroad. After graduation, he did his postdoctoral training at Stanford University advised by Prof. Matteo Cargnello and Washington State University advised by Prof. Yong Wang. His postdoctoral research focused on nanomaterials synthesis and heterogeneous catalytic reactions, including complete oxidation of methane for natural gas emission control. He has published 16 first-authorship papers in prominent scientific journals, including Science, Angewandte Chemie, ACS Catalysis, Chemistry of Materials, Journal of Physical Chemistry Letters, etc.
报告提纲：
Developing efficient processes for the conversion of energy and environmental protection are among the primary goals of sustainability. Nanoscale engineering of materials with desired chemical properties plays a crucial role in promoting technical advances in these fields. This presentation will discuss my research efforts in the study of structure-property relationships of well-defined materials. First, I will discuss the manipulation of the fine structure of palladium nanoparticles to generate better catalytic performance. It is shown that steam pretreatment of palladium catalysts provides a twelve-fold increase in the reaction rate in methane oxidation. A combination of experimental and theoretical methods identified that the increased reactivity was attributed to an increase in the grain boundary density through crystal twinning. Further activity increases could be achieved by the introduction of more grain boundaries through laser ablation. Overall, the combination of fundamental study and the rational design of materials opens broad opportunities for critical energy conversion and chemical transformation processes.
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