Atomistic Studies of Reactions on Surfaces

9400526确定吸附层的空间组织与其反应性的动力学描述之间的关系是由分析和表面化学方案支持的这一研究项目的目标。依赖温度的扫描隧道显微镜将被用来分离、稳定和成像反应中间体。然后，这些结构信息将与这些反应的动力学研究相关联，使用热脱附谱作为反应动力学的主要探针。将研究几个反应体系，包括铜(110)的氧化，氧在铂(100)上的脱附，碳酸盐在银(110)上的形成，以及甲酸盐和醇盐在铜表面的分解。这些体系中的每一个要么显示出不寻常的反应动力学，要么显示出反应覆盖层中有趣的结构变化的证据。在表面化学中，表面层有序化和动力学过程之间的联系是一个相对未被探索的领域。这个项目的工作将影响我们对覆盖层有序性和表面反应性之间联系的理解，并可能对组织介质中的反应产生重要影响，远远超出要研究的单个表面反应。***

9400526 Madix The determination of the relationship between the spatial organization of adsorbed layers and the kinetic description of their reactivity is the goal of this research project supported by the Analytical and Surface Chemistry Program. Temperature dependent scanning tunneling microscopy will be used to isolate, stabilize and image reaction intermediates. This structural information will then be correlated with kinetic studies of these reactions, using thermal desorption spectroscopy as the primary probe of reaction kinetics. Several reaction systems will be investigated, including the oxidation of Cu(110), the desorption of oxygen from Pt(100), the formation of carbonate on Ag(110), and the decomposition of formates and alkoxides on copper surfaces. Each of these systems either shows unusual reaction kinetics or evidence of interesting structural variations in the reacting overlayers. %%% The connection between overlayer ordering and kinetic processes in surface reactions is a relatively unexplored area of surface chemistry. The work of this project will impact on our understanding of the connection between overlayer ordering and surface reactivity, and may have important implications for reactions in organized media well beyond the individual surface reactions to be studied. ***