Surface Chemistry of Palladium Monolayers and Thin Films

这个项目是在分析和表面化学的一般领域和多相催化的子领域。首席研究员将在单晶钽表面沉积钯单层和多层薄膜，并研究这些薄膜表面化学性质的变化。研究的重点是将吸附/解吸动力学、化学吸附键强度和反应性的变化与钯覆盖层的几何和电子结构联系起来。关键数据将通过高分辨率电子能量损失光谱和离子散射光谱获得。这些基础研究有望为设计具有新的独特表面性能的材料提供新的化学见解，并有助于在原子水平上解释合金和双金属团簇催化剂的选择性，这在石油工业中很重要。

This project is in the general area of analytical and surface chemistry and in the subfield of heterogeneous catalysis. The principal investigator will deposit palladium monolayers and multilayer thin films on single crystal tantalum surfaces and study the altered surface chemical properties of these overlayers. The work will focus on correlating changes in adsorption/desorption kinetics, chemisorption bond strength and reactivity with geometric and electronic structure of the palladium overlayer. Critical data will be obtained by high resolution electron energy loss spectroscopy and ion scattering spectrometry. These fundamental studies are expected to produce new chemical insight into the design of materials with new and unique surface properties and to aid the atomic level explanation of the selectivity of alloy and bimetallic cluster catalysts which are important in the petroleum industry.