The Spatial Dimension of Adsorption and Reaction of Metal Surfaces

该研究项目由分析和表面化学 程序，调查表面反应的空间维度。 使用 扫描隧道显微镜和超高真空光谱技术，教授 马里兰大学帕克分校的伯内特-罗比和她的同事们 正在探索金属表面的自扩散事件， 这些事件与吸附和反应过程的相互作用， 这些表面。 氢在Al（111）邻面上的吸附 探索阶梯式表面位分布和吸附驱动的阶梯 运动和刻面。 吸附态的碳-碳偶合反应 在Ag（001）表面上监测到碘苯和丙基碘， 为了解决问题的反应物排序和空间 反应概率的依赖性。 在研究表面反应的空间依赖性时， Robett-Robey致力于解决非均相的分子机制， 催化作用 利用显微镜和光谱学方法 问题，她能够阐明催化剂的详细机制， 反应物吸附引起的台阶运动，以及反应物 对特定反应发生的可能性的取向。 的 从这些研究中获得的信息对于制定详细的 了解异构技术的重要领域 催化作用

This research project, supported by the Analytical and Surface Chemistry Program, investigates the spatial dimension of surface reactions. Using scanning tunneling microscopy and UHV spectroscopic techniques, Professor Reutt-Robey and her coworkers at the University of Maryland-College Park are exploring self-diffusion events on metallic surfaces and the interaction of these events with adsorption and reaction processes on these surfaces. Hydrogen adsorption on vicinal Al(111) surfaces is used to probe stepped surface site distributions and adsorption driven step motion and facetting. Carbon-carbon coupling reactions of adsorbed iodobenzene and propyliodide are monitored on the Ag(001) surface in order to address the questions of reactant ordering and spatial dependences of reaction probabilities. In studies of the spatial dependence of surface reactions, Professor Reutt-Robey is addressing the molecular mechanisms of heterogeneous catalysis. Using microscopic and spectroscopic approaches to these questions, she is able to elucidate the detailed mechanisms of catalyst step motion induced by reactant adsorption, and the effect of reactant orientation on the likelihood of a particular reaction occurring. The information gained from these studies is useful in developing a detailed understanding of the technologically important field of heterogeneous catalysis.