The Spatial Dimension of Adsorption and Reaction of Metal Surfaces

金属表面吸附与反应的空间维度

• 批准号: 9800470
• 负责人: Janice Reutt-Robey
• 金额: $ 32.87万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9800470&HistoricalAwards=false
• 关键词: Spatial; Dimension; Adsorption; Reaction; Metal

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.

该研究项目由分析和表面化学计划支持，研究表面反应的空间维度。 马里兰大学帕克分校的 Reutt-Robey 教授和她的同事利用扫描隧道显微镜和特高压光谱技术探索金属表面的自扩散事件以及这些事件与这些表面上的吸附和反应过程的相互作用。 邻位 Al(111) 表面上的氢吸附用于探测阶梯式表面位点分布以及吸附驱动的阶梯运动和刻面。 在 Ag(001) 表面上监测吸附的碘苯和碘丙烷的碳-碳偶联反应，以解决反应物排序和反应概率的空间依赖性问题。 在表面反应空间依赖性的研究中，Reutt-Robey 教授正在研究多相催化的分子机制。 利用微观和光谱方法解决这些问题，她能够阐明反应物吸附引起的催化剂步进运动的详细机制，以及反应物取向对特定反应发生可能性的影响。 从这些研究中获得的信息有助于详细了解多相催化这一技术重要领域。