Solid-State Deuterium NMR of Adsorbates on Heterogeneous Catalysts

这项研究项目，在分析和表面化学计划中，将研究吸附分子与多相催化剂的相互作用，在高磁场下使用固态氢核磁共振方法。将研究重氢和各种重氢分子，主要是吸附在氧化铝负载的铂和铑催化剂上。将讨论有关氢化物交换、C-H键活化、吸附物和底物之间的电荷转移以及吸附物迁移率等问题。此外，还将开展四极耦合常数的超高场低温研究。还将尝试获得吸附在单晶金属表面上的单分子层的核磁共振谱。%了解吸附在催化材料表面的分子的结构和反应活性对于多相催化过程的设计和使用至关重要。这项研究计划将开发强大的核磁共振光谱方法，用于确定催化剂表面吸附的分子结构。这些结构信息将使人们能够设计和了解对化学工业和减少污染技术至关重要的催化系统。

This research project, in the Analytical and Surface Chemistry Program, will study the interaction of adsorbed molecules with heterogeneous catalysts, using solid-state deuterium NMR methods at high magnetic fields. Deuterium and various deuterated hydrocarbon molecules will be studied, adsorbed primarily on alumina supported platinum and rhodium catalysts. Questions concerning hydride exchange, C-H bond activation, charge transfer between adsorbate and substrate, and adsorbate mobility will be addressed. In addition, very high field low temperature studies of quadrupolar coupling constants will be carried out. An attempt will also be made to obtain an NMR spectrum for a monolayer adsorbed on a single crystal metal surface. %%% An understanding of the structure and reactivity of molecules adsorbed on the surface of catalytic materials is essential to the design and use of heterogeneous catalytic processes. This research program will develop powerful nuclear magnetic resonance spectroscopic methods for the determination of the structure of adsorbed molecules on catalytic surfaces. This structural information will allow the design and understanding of catalytic systems crucial to the chemical industry and to pollution abatement technologies.