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

傅里叶变换质谱激光诱导解吸表面反应的动力学和机制

• 批准号: 0416171
• 负责人: John Hemminger
• 金额: $ 49万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-15 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0416171&HistoricalAwards=false
• 关键词: Kinetics; Mechanisms; Surface; Reactions; Laser

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.

Hemminger/UC-Irvine加州大学欧文分校化学系的Hemminger教授和他的同事们正在使用激光解吸傅里叶变换质谱法来研究过渡金属表面反应的基本动力学和机理。 在分析和表面化学计划的支持下，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薄氧化膜的影响，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，以提供反应机理和动力学的清晰图像，特别是集中在氢化和脱氢化学。 从这些研究的基本信息是有用的，在发展多相催化的理解。本研究计画将探讨重要碳氢化合物氢化与脱氢反应的基本机制与动力学。 这项工作结合了结构信息从扫描隧道显微镜和振动光谱与动力学信息从激光解吸方法。 从这项工作中获得的基本见解提供了重要的催化过程的理解。