Kinetics and Mechanisms of Surface Reactions by Laser-Induced Desorption with Fourier Transform Mass Spectrometry

Hemminger/ uc - irvine加州大学欧文分校化学系的Hemminger教授和他的同事正在使用激光解吸傅立叶变换质谱法研究过渡金属表面反应的基本动力学和机制。在分析和表面化学项目的支持下，他们正在研究过渡金属表面和过渡金属颗粒的纳米结构对氧化薄膜的影响，以及对碳氢化合物表面反应动力学的影响。STM、振动光谱和电子光谱与激光解吸方法相结合，提供了反应机理和动力学的清晰图像，特别是集中在加氢和脱氢化学上。从这些研究中获得的基本信息对于发展对多相催化的理解是有用的。本课题研究了重要的烃类加氢和脱氢反应的基本机理和动力学。这项工作将扫描隧道显微镜和振动光谱的结构信息与激光解吸方法获得的动力学信息相结合。从这项工作中获得的基本见解提供了对重要催化过程的理解。

AbstractCHE-0416171Hemminger/UC-IrvineProfessor Hemminger and his colleagues in the Chemistry Department at the University of California-Irvine are using laser desorption Fourier transform mass spectrometry to examine the fundamental kinetics and mechanisms of reactions on transition metal surfaces. With the support of the Analytical and Surface Chemistry Program, they are investigating the effect of nano-structuring of transition metal surfaces and transition metal particles on thin oxide films, and on the kinetics of hydrocarbon surface reactions. STM, vibrational spectroscopy, and electron spectroscopy are combined with the laser desorption method to provide a clear picture of the reaction mechanism and kinetics, particularly concentrating on hydrogenation and dehydrogenation chemistry. Fundamental information from these studies is useful in developing an understanding of heterogeneous catalysis. The fundamental mechanisms and kinetics of important hydrocarbon hydrogenation and dehydrogenation reactions are being examined in this research project. This work combines structural information from scanning tunneling microscopy and vibrational spectroscopy with kinetic information obtained from laser desorption methods. Fundamental insights gained from this work provide an understanding of important catalytic processes.