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

摘要提案题目：负载式单层钒催化剂中支撑效应起源的基础研究提案号：cts -0139613项目负责人：John VohsInstitution of pennsylvania该项目的目的是对负载式单层钒催化剂的支撑效应提供更详细的基础认识。该系统研究的具体目标是提供有关钒-支撑界面键合性质的定量信息。本文将研究载体的性质如何影响V-O载体键的强度和氧化还原性能。催化表面的反应性将通过研究涉及醇选择性氧化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支撑在金属氧化物单晶表面的气相沉积钒膜组成。表面敏感光谱技术包括高分辨率电子能量损失光谱（HREELS）、x射线光电子能谱（XPS）和程序升温解吸（TPD）等，将用于表征催化表面和表面上的化学物质。负载型金属氧化物在工业上用于多种化学过程，包括选择性氧化和NOx的催化还原，该研究可能会导致催化材料生产方法的改进。

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.