Atomistic Studies of Reactions on Surfaces

表面反应的原子研究

• 批准号: 0209546
• 负责人: Robert Madix
• 金额: $ 54万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0209546&HistoricalAwards=false
• 关键词: Atomistic; Studies; Reactions; Surfaces

This research project, supported in the Analytical and Surface Chemistry Program, addresses the question of the effect of the spatial and temporal organization of adsorbed reactants and reactive intermediates on the kinetics of surface reactions. Using scanning tunneling microscopy, Professor Madix and his coworkers in the Department of Chemical Engineering at Stanford University, examine the spatial distribution of adsorbed species in static and time dependent measurements. Studies of oxidation reactions on silver, auto-catalytic surface explosions on nickel and palladium, and poisoning and promotion by selected surface reaction modifiers are examined. In addition, the steady state distribution of adsorbed intermediates in surface oxidation reactions are studied. Information from this experimental project provides input into the development of detailed models of surface reaction kinetics, as well as fundamental insight into the nature of the dynamic catalytic surface. Understanding the effect of the organization of reactive intermediates in two dimensions on the overall kinetics of surface reactions is the goal of this research project carried out by Professor Madix at Stanford University. Using tools that allow the atomic level imaging of the reacting surface, detailed information about the role of adsorbate structure on the surface reaction kinetics is obtained. This information is crucial to our detailed understanding of a range of important catalytic reaction systems, and extends to the understanding of surface reactions in a variety of technologically important contexts.

这个研究项目，在分析和表面化学计划的支持下，解决了吸附的反应物和活性中间体的空间和时间组织对表面反应动力学的影响的问题。 利用扫描隧道显微镜，Mastern教授和他的同事在化学工程系在斯坦福大学，检查吸附物种的空间分布在静态和随时间变化的测量。 研究了银的氧化反应，镍和钯的自催化表面爆炸，以及所选表面反应改性剂的中毒和促进作用。 此外，还研究了表面氧化反应中吸附中间体的稳态分布。 从这个实验项目的信息提供输入到表面反应动力学的详细模型的发展，以及基本洞察到动态催化表面的性质。了解二维活性中间体组织对表面反应整体动力学的影响是斯坦福大学Mastern教授开展的这项研究项目的目标。 使用的工具，允许原子水平的反应表面的成像，详细的信息，吸附物结构的作用，表面反应动力学。 这些信息对于我们详细了解一系列重要的催化反应系统至关重要，并延伸到了解各种技术重要背景下的表面反应。