Kinetics of Surface Reactions Studied by Laser-Induced Thermal Desorption with Fourier Transform Mass Spectrometry

激光诱导热解吸和傅里叶变换质谱研究表面反应动力学

• 批准号: 9313169
• 负责人: John Hemminger
• 金额: $ 17万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-12-01 至 1995-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9313169&HistoricalAwards=false
• 关键词: Kinetics; Surface; Reactions; Studied; Laser

9313169 Hemminger In this research project, supported in the Analytical and Surface Chemistry Program, the kinetics of reactions carried out on well characterized solid surfaces will be examined. The research supported here will concentrate on the detailed mechanisms and kinetics of hydrocarbon reactions on transition metal surfaces. These kinetic studies will be carried out using a technique developed by Professor Hemminger known as laser induced thermal desorption Fourier transform mass spectrometry (LITD/FTMS). The goal of this work is to apply this LITD/FTMS method to the study of the effect of adsorbate ensemble configurations on reaction rates, and to identify and quantify the effects of hydrogen coadsorption on the mechanisms and kinetics of hydrocarbon reactions. Additional work will address the kinetics of organometallic adsorbate decomposition on transition metal surfaces as a possible route to the synthesis of reactive intermediates on these surfaces. %%% An understanding of the detailed mechanisms and kinetics of hydrocarbon reactions on well characterized tranisition metal surfaces is important for developing an understanding of heterogeneous catalysis. The research supported in this project will provide the mechanistic and kinetic details needed to help understand issues of reactivity and selectivity in catalytic systems. A very sensitive instrumental technique, laser induced thermal desorption coupled with Fourier transform mass spectrometry, will be used to obtain this basic information. An understanding of these transition metal catalyzed reactions will help to design more energy efficient and more environmentally sensitive process chemistry. ***

9313169 Hemminger在这个研究项目中，在分析和表面化学程序的支持下，进行了充分表征固体表面的反应动力学将被检查。 这里支持的研究将集中在过渡金属表面上烃反应的详细机制和动力学。 这些动力学研究将使用Hemminger教授开发的称为激光诱导热解吸傅里叶变换质谱法（LITD/FTMS）的技术进行。 这项工作的目标是应用这种LITD/FTMS方法的吸附物系综配置对反应速率的影响的研究，并确定和量化的氢共吸附的烃类反应的机制和动力学的影响。 额外的工作将解决过渡金属表面上的有机金属吸附物分解的动力学作为一种可能的途径，在这些表面上的活性中间体的合成。 了解烃类在过渡金属表面上反应的详细机理和动力学，对于理解多相催化是很重要的。该项目支持的研究将提供所需的机制和动力学细节，以帮助理解催化体系中的反应性和选择性问题。 一个非常敏感的仪器技术，激光诱导热解吸与傅里叶变换质谱法，将用于获得这一基本信息。 对这些过渡金属催化反应的理解将有助于设计更节能和更环保的工艺化学。 ***