Surface Photochemistry of Molecules Adsorbed on Supported Metal Catalysts

在这项研究项目中，在分析和表面化学计划的支持下，Grassian教授将使用可调谐脉冲激光和宽带光源来研究氧化物负载金属颗粒上吸附的光解离和光解吸。红外和质谱学将被用来监测吸附在铂/二氧化硅和铂/氧化铝表面的甲基卤化物和一氧化碳的反应。这项研究的结果将有助于研究人员了解表面光化学的动力学。在超高真空条件下，对高比表面积支撑粒子的测量将与在单晶金属表面上获得的类似系统的测量结果进行比较。光与催化体系的相互作用可能是催化合成新分子物种的重要途径。为了研究光催化的可能性和前景，必须对高度分散的氧化物负载金属颗粒的光引发化学有详细的了解。这项研究项目解决了光催化过程中的基本问题。

In this research project, supported by the Analytical and Surface Chemistry Program, Professor Grassian will study the photodissociation and photodesorption of adsorbates from oxide supported metal particles, using both tunable pulsed laser and broadband light sources. Infrared and mass spectrometry will be used to monitor the reactions of methyl halides and CO adsorbed on Pt/SiO2 and Pt/Al2O3 surfaces. The results of this research will help researchers to understand the dynamics of surface photochemistry. Measurements on high surface area supported particles will be compared with results obtained for similar systems on single crystal metal surfaces in ultra high vacuum. %%% The interaction of light with catalytic systems may be an important route to the catalytic synthesis of novel molecular species. In order to investigate the possibility and promise of photocatalysis, a detailed understanding of photoinitiated chemistry on highly dispersed oxide supported metal particles must be obtained. This research project addresses the fundamental questions underlying photocatalytic processes.