An Investigation of the Structure of and Chemisorption on Model Supported Oxides by Electron Spectroscopies

利用低能电子衍射（LEED）、俄歇光谱（Auger）和高分辨率电子能量损失光谱（HREELS）以及化学吸附和催化活性测量等电子能谱技术，研究了钒或钼在二氧化钛或氧化铝单晶上的薄膜。在单晶衬底上可以形成有序的单层结构，如果是这样，将观察到这些结构对催化活性的影响。结果将与相同组成的高表面催化剂的数据进行比较和关联。负载在氧化物上的氧化物包括很大一部分工业催化剂；它们被广泛用于碳氢化合物的选择性氧化。真正的催化剂已经被研究过，但这是一个研究“模型”催化剂的建议-在化学成分上类似于非常多孔的真实催化剂的近平面结构。对于许多技术来说，模型系统更容易研究并提供更详细的信息。

Thin films of vanadia or molybdena on single crystals of titania or alumina are investigated using electron spectroscopies including low-energy electron diffraction (LEED), Auger spectroscopy, and high-resolution electron energy-loss spectroscopy (HREELS), as well as chemisorption and measurement of catalytic activity. Ordered monolayer structures may form on the single crystal substrates, and, if so, the influence of these structures on catalytic activity will be observed. Results will be compared with and related to data on high-surface catalysts of the same composition. Oxides supported on oxides comprise a significant fraction of industrial catalysts; they are widely used for the selective oxidation of hydrocarbons. Real catalysts have been studied, but this is a proposal to study "model" catalysts - near planar structures similar in chemical composition to the very porous real catalysts. For many techniques, model systems are much easier to study and give more detailed information.