Fundamental Studies of the Origin of Support Effects in Supported Monolayer Vanadia Catalysts

命题：负载型单层钒催化剂中载体效应起源的基础研究命题编号：CTS-0139613主要研究员：约翰·沃斯研究所：宾夕法尼亚大学这个项目的目的是提供对单层钒催化剂上载体效应的更详细的基础性理解。该系统研究的具体目标是提供有关钒-载体界面成键性质的定量信息。我们将研究载体的一致性如何影响V-O载体键的强度和氧化还原性质。催化表面的反应性将通过研究与醇的选择氧化有关的基本表面反应的动力学参数来表征。所研究的模型催化系统将由负载在金属氧化物单晶表面的气相沉积的钒薄膜组成。高分辨电子能量损失谱(HREELS)、X射线光电子能谱(XPS)和程序升温脱附(TPD)等表面敏感光谱技术将被用来表征催化表面和表面上的化学物种。负载型金属氧化物在工业上被用于各种化学过程，包括选择性氧化和催化还原NOx，这项研究可能会导致生产催化材料的方法的改进。

AbstractProposal Title: Fundamental Studies of the Origin of Support Effects in Supported Monolayer Vanadia CatalystsProposal Number: CTS-0139613Principal Investigator: John VohsInstitution: University of PennsylvaniaThe objective of this project is to provide a more detailed fundamental understanding of support effects on monolayer vanadia catalysts. Specific goals of the investigations of this system are to provide quantitative information on the nature of the bonding at the vanadia-support interface. The methods by which the identity of the support influences the strengths and redox properties of V-O support bonds will be studied. Reactivity of the catalytic surface will be characterized through a study of kinetic parameters for elementary surface reactions involved in the selective oxidation of alcohols. The model catalytic systems studied will consist of vapor deposited vanadia films supported on the surfaces of metal oxide single crystals. Surface sensitive spectroscopic techniques including high-resolution electron energy loss spectroscopy (HREELS), x-ray photoelectron spectroscopy (XPS), and temperature programmed desorption (TPD), among others will be used to characterize the catalytic surface and the chemical species on the surface. Supported metal oxides are used industrially for a variety of chemical processes including selective oxidations and the catalytic reduction of NOx, and this study may lead to improved methods for the production of catalytic materials.