Adsorbate Photochemical Dynamics and Catalysis

该研究项目解决了在良好表征的固体表面的光致反应的详细动力学。 使用角度分辨飞行时间测量，弗吉尼亚大学的Ian Harrison教授和他的学生正在探索吸附物（如N2，CO2和甲烷）的光活化。 在分析和表面化学计划的支持下，这项工作提供了对表面小分子活化机制的详细了解，对非均相催化方法的开发和改进具有重要意义。 电荷转移激发这些吸附的分子，然后分析的解吸产物，允许该组探测光刺激以及热刺激的表面反应的过渡态的细节。 吸附分子的光激发可用于探测表面上更常见的热活化过程的动力学。 该研究项目使用快速激光激发吸附物，然后通过角度分辨测量产品速度，以提供有关几个重要的小分子反应的详细动力学信息，以及表征表面。 这些光动力学研究的结果，然后应用到相当重要的热活化催化反应的机制的理解。

This research project addresses the detailed dynamics of photoinduced reactions at well-characterized solid surfaces. Using angle resolved time-of-flight measurements, Professor Ian Harrison and his students at the University of Virginia are exploring the photoactivation of adsorbates such as N2, CO2, and methane. With the support of the Analytical and Surface Chemistry Program this work provides detailed insight into the mechanisms of small molecule activation at surfaces, with strong implications for the development and improvement of heterogeneous catalytic methods. Charge transfer excitation of these adsorbed molecules followed by analysis of the desorbed products, allows this group to probe the details of the transition state for photostimulated as well as thermally stimulated surface reactions. The photoexcitation of adsorbed molecules can be used to probe the dynamics of more common thermally activated processes on surfaces. This research project uses fast laser excitation of adsorbates, followed by angle resolved measurements of product velocities to provide information about the detailed dynamics of several important small molecule reactions on well-characterized surfaces. The results of these photodynamic studies are then applied to the understanding of the mechanisms of thermally activated catalytic reactions of considerable importance.