Atomistic Studies of Reactions on Surfaces

在分析和表面化学计划的支持下，哈佛大学的Mastern教授和他的同事们正在研究吸附在金属表面上的物质的二维组织对表面反应性的影响。 扫描隧道显微镜，再加上光电子能谱，红外，和程序升温脱附被用来检查当地的空间和时间分布的表面改性剂和反应物。 三个特定的问题得到解决，将金属原子的反应中间体的结构，表面结构形成的环氧化反应的银，和金属表面上的自催化反应的起源。 这项工作提供了有关多相催化动力学的基本信息，这是一个具有巨大商业重要性的过程。哈佛大学的Masters教授和他的同事正在研究表面空间组织对表面反应动力学和动力学的影响。使用显微镜和光谱方法，他们正在解决中间体形成，自催化和环氧化机制的具体问题，以及表征表面。 这一基本信息有力地增加了我们对多相催化过程的理解。

AbstractCHE-0513936Madix/HarvardWith the support of the Analytical and Surface Chemistry Program, Professor Madix and his coworkers at Harvard University are investigating the effects of the two dimensional organization of species adsorbed on metal surfaces on surface reactivity. Scanning tunneling microscopy, coupled with photoelectron spectroscopy, infrared, and temperature programmed desorption are used to examine the local spatial and temporal distribution of surface modifiers and reactants. Three particular issues are addressed; the incorporation of metal atoms in to the structure of reaction intermediates, the surface structures formed in epoxidation reactions on silver, and the origin of autocatalytic reactions on metal surfaces. This work provides fundamental information about the dynamics of heterogeneous catalysis, a process of immense commercial importance. Professor Madix and his coworkers at Harvard University are studying the effects of surface spatial organization on the kinetics and dynamics of surface reactions. Using microscopic and spectroscopic methods, they are addressing specific questions of intermediate formation, autocatalysis, and epoxidation mechanisms on well characterized surfaces. This fundamental information strongly adds to our understanding of heterogeneous catalytic processes.