???陈诉题目：基于多孔纤维和金属纳米晶体的催化体系(Catalytic Systems Based on Porous Fibers and Metal Nanocrystals)

???報告人：呂平

???報告時間：2016年7月19日(星期二)??上午9:00~11:30

???報告地點：工程樓604室

???報告人簡介：

???呂平，博士，美國長島大學化學與生物化學系助理教授。于2009年在美國加州大學戴維斯分校獲得博士學位，並先後在美國聖路易斯華盛頓大學、佐治亞理工學院開展博士後研究。現擔任Carbohydrate Polymers編委。研究偏向聚焦于應用于能源、環境、康健領域的聚合物和無機納米結構的合成、制備和表征。先後在Journal of the American Chemical Society、Angewandte Chemie International Edition、Nano Letters等期刊發表論文30余篇。積極同工業界企業開展相助致力于開發新型催化劑，部门相助结果已應用于指導環境領域商業催化劑的設計與合成。

???學術報告的英文摘要如下：

Heterogeneous catalysis is of vital importance to the world’s economy and the sustainable development of our society. Catalyst sintering, the loss of activity and/or selectivity at high temperatures, is a great challenge and continuing concern in the application of heterogeneous catalysts. Although it is inevitable that all catalysts will sinter and deactivate over time, its immediate and drastic consequences can be avoided or postponed by a rational design of the catalyst structure. In my study, I employed porous fibers as a new form of catalyst supporting materials to enhance the sinter-resistance of catalyst nanoparticles. Porous fibers were fabricated by a rapid phase separation during electrospinning and/or the following calcination. The high surface area and porosity of fibers increased the distance among catalyst nanoparticles. The strong interactions between oxides and metal nanoparticles as well as the site-selective protective layers significantly stabilized catalysts and retained their catalytic activity. Moreover, metal nanocrystals (e.g., palladium) with precisely controlled sizes and shapes were synthesized and applied as catalysts to study their sintering behaviors under real application conditions. In addition, the sulfurization of palladium nanocubes was studied to understand the deactivation mechanism of metal nanocrystals through sulfur poisoning.

???歡迎列位老師、同學及其他相關人員光臨並參與討論！