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

摘要提案标题：负载型单层钒氧化物催化剂中载体效应起源的基础研究提案编号：CTS-0139613主要研究员：John Vohs机构： 该项目的目的是提供一个更详细的基本了解支持单层钒氧化物催化剂的影响。 该系统的调查的具体目标是提供定量信息的性质的结合在氧化钒支持界面。 将研究载体的特性影响V-O载体键的强度和氧化还原性质的方法。 催化表面的反应性将通过研究醇的选择性氧化中所涉及的基本表面反应的动力学参数来表征。 研究的模型催化系统将包括气相沉积的氧化钒薄膜支持在金属氧化物单晶的表面上。 表面敏感光谱技术，包括高分辨率电子能量损失谱（HREELS），X射线光电子能谱（XPS），和程序升温脱附（TPD），除其他外，将用于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用于各种化学过程，包括选择性氧化和NOx的催化还原，这项研究可能会改进催化材料的生产方法。

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.