报告时间：2013年10月24日（星期四）上午 9：30 

　　报告地点：能源基础楼一楼会议室 

　　报告人：Peter C. Stair 

　　Northwestern University,USA 

　　报告人简介： 

　　Peter C. Stair教授是国际催化和表面科学领域著名科学家，美国西北大学化学系主任，能源过程催化研究所主任，并兼任阿贡国家实验室资深科学家。Stair教授先后获得德国洪堡奖，美国ACS George Olah Award等奖励，2001年受聘为我所客座研究员。 

　　Stair教授长期从事表面科学的研究，近十余年致力于表面科学和催化基础研究，取得重要进展，特别是利用紫外拉曼光谱研究催化剂积碳失活机理，发展了原子层沉积（Atomic Layer Deposition，ALD）方法，从纳米层次上设计合成模型催化剂，在催化剂失活和择形选择性等催化基础重大科学问题的研究引起国际催化学术界广泛关注。 

　　报告摘要： 

　　Atomic Layer Deposition (ALD) has enormous potential for the synthesis of advanced heterogeneous catalysts with control of composition and structure at the atomic scale. The ability of ALD to produce conformal oxide coatings on porous, high-surface area materials can provide completely new types of catalyst supports. At the same time ALD can achieve highly uniform catalytically active metal and oxide phases with (sub-) nanometer dimensions. This lecture will provide examples from our laboratory of ALD used to synthesize oxide supports, catalytic oxide overlayers, metal nanoparticles, and new porous structures. These materials have been characterized by SEM, XRF, ICP, UV-Vis absorption spectroscopy, Raman spectroscopy and evaluated for catalysis of oxidative and non-oxidative alkane dehydrogenation, selective photo-oxidation, and combustion. We have focused on the synthesis of supported metal nanoparticles and developed a procedure in which the metal and support materials are grown sequentially in each ALD cycle. This method makes possible the synthesis of exceptionally small particles, ca. 0.5 nm. Using additional ALD support layers at the conclusion of the growth, a process we call overcoating, the metal particles can be stabilized against sintering and leaching while still remaining active under harsh conditions in both gas and liquid phase reactions. Through proper annealing procedures the overcoating oxide develops porosity, thus ALD becomes a method for introducing and controlling pore structures. Finally, with templated ALD it is possible to prepare surface cavities, which we call nanobowls. These structures exhibit size selectivity, where large molecules are excluded from interacting with the catalyst material. 

　　报告联系人：505组  毛佳（9307）