报告题目：
Materializing Electrochemical Technologies: From Fuel Cells to Ozonators
报告人：香港大学化学系陈光宇教授
报告时间：2007年7月14日下午15:30-17:00
报告地点: 浙江大学玉泉校区教八-107

陈光宇教授简介:
杰出研究奖 (香港大学 1998)
高级客座研究员（清华大学 1999年）
纳米科学实验杂志编辑（亚洲）
分子模拟杂志编辑(亚洲)

化学工程哲学博士，康奈尔大学，美国纽约州伊萨卡，1988年化学工程学硕士，康奈尔大学，1984年
化学工程理学士，阿尔伯塔大学，加拿大埃德蒙顿，1979年

陈光宇教授主要从事分子模拟, 电化学, 燃料电池和传感器, 界面科学和技术, 材料和扫描探针显微镜应用等方面的研究，已经发表了100多篇学术论文，取得了10多项国家专利，出版了多部科学专著，并多次在重要学术会议上作特邀报告。
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化学系分子设计与应用研究所
2007年7月11日

附：Abstract of the Lecture:
Materializing Electrochemical Technologies: From Fuel Cells to Ozonators

Kwong-Yu CHAN
Department of Chemistry, University of Hong Kong.

Electrochemical reactions are limited by transport of molecules, ions, and electrons in and out of an interface. In addition to chemical kinetic limitations, engineering electrochemistry requires structuring materials in multiple length scales to enhance the transport properties. Syntheses and characterizations a few materials and their applications to fuel cells and ozonation are reported.

For fuel cell catalysis, efforts are made to refine the synthesis of supported metal/metal oxide particles. Micro-emulsion and glycol syntheses of Pt-Ru, Pt-Co, and PtWO3 are presented with the objectives of controlling size and composition at the nanometer scale. To support the nanometals, porous carbons with well-defined nano-structures can now be synthesized through templates of ordered mesoporous silicas including SBA-15 (CMK-3), SBA-16, and FDU-12. The uses of these mesoporous carbon supports in methanol oxidation are investigated.

The effectiveness of ozone as a powerful and green oxidant is well-proven, but the scale of ozone application has been limited by the capital and operating costs of ozone generation via the conventional process of cold corona discharge. The generation of ozone from water electrolysis offers advantages of NOx free generation, higher ozone concentration, and lower capital costs. Our study of doped tin oxide electrode found 35% current efficiency, 15% gaseous ozone concentration, and 35 mg/L dissolved ozone concentration. The correlation of materials properties to the mechanism of ozone generation will be discussed.