报告人：Prof. Yushan Yan
Department of Chemical and Environmental Engineering,
University of California, Riverside, CA 92521
题 目：Nanotechnology for Cheaper, More Durable, and More Efficient Fuel Cells
时间：8月23日上午10点
地点：玉泉校区教十～4115
欢迎有兴趣的老师和同学参加！
材料与化学工程学院
2007.8.20
Abstract
Polymer electrolyte fuel cells (PEFCs) fueled by hydrogen or methanol have been considered promising for powering vehicles, homes, and portable electronic devices. Their widespread commercial use, however, hinges on our ability to further reduce their cost and improve their durability and efficiency. At the heart of a PEFC are an anode catalyst layer, a cathode catalyst layer, and a polymer electrolyte membrane. For the catalysts, a longstanding goal has been to develop a catalyst with high dispersion, utilization, durability, and activity for oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR), while for the membrane desirable properties are the ability to operate at high temperatures for the hydrogen fuel cell and have low methanol crossover for the methanol fuel cell. In this presentation, I will discuss our work on using carbon nanotubes (CNTs), platinum nanotubes (PtNT), and conductive polymer nanotubes to replace amorphous carbon nanoparticles as the catalyst support or the whole catalyst and show that they can improve catalyst utilization, durability, and activity for ORR and MOR. I will also discuss our work on using acid functionalized zeolite nanoparticles to form polymer-zeolite nanocomposite membranes to improve fuel cell operating temperature and reduce methanol crossover.
