Solid-State Deuterium NMR of Adsorbates on Heterogeneous Catalysts

该研究项目属于分析和表面化学项目，将使用固体氘核磁共振方法在高磁场下研究吸附分子与非均相催化剂的相互作用。将研究氘和各种氘化烃分子，主要吸附在氧化铝负载的铂和铑催化剂上。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的问题将被解决。此外，还将进行四极耦合常数的甚高场低温研究。还将尝试获得吸附在单晶金属表面上的单层的核磁共振谱。了解吸附在催化材料表面的分子的结构和反应性，对于设计和使用多相催化过程是必不可少的。本研究计划将发展强大的核磁共振光谱方法来测定催化表面吸附分子的结构。这些结构信息将有助于设计和理解对化学工业和污染减排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.