Surface Diffusion and Reaction Kinetics on Single-Crystal Metal Surfaces

这个建议是在分析化学和表面化学的一般领域和在表面动力学和激光解吸的子领域。利用激光诱导热脱附（LITD）技术研究金属和化学添加剂对表面反应动力学的影响。探讨铜和钾添加剂对甲醇在钌单晶（100）表面扩散和反应动力学的影响。扩散和反应的速率将通过用不同的添加剂覆盖来调节表面电子结构而逐渐改变。阐明了控制表面动力学参数的因素。表面上基本过程的动力学是微观理解表面化学和物理的核心。表面动力学现象在预测和控制多相催化方面也起着重要作用。在这些研究中进行的动力学测量将有助于阐明确定反应动力学中各个基本步骤的作用，并为理论模型的测试提供实验基础。

This proposal is in the general area of analytical and surface chemistry and in the subfields of surface dynamics and laser desorption. The effects of metallic and chemical additives on surface reaction kinetics will be investigated using laser-induced thermal desorption (LITD) techniques. Effects of copper and potassium additives on the surface diffusion and reaction kinetics of methanol on the (100) face of ruthenium single crystals will be explored. Rates of diffusion and reaction will be altered progressively by modulating the surface electronic structure with varying additive coverage. Factors that control surface kinetic parameters will be elucidated. The kinetics of elementary processes on surfaces are central to a microscopic understanding of surface chemistry and physics. Surface kinetic phenomena also play an essential role in predicting and controlling heterogeneous catalysis. The kinetic measurements that will be carried out in these studies will help to elucidate the role of individual elementary steps in determining reaction kinetics and provide an experimental basis for testing of theoretical models.