Model Studies of the Mechanism of Catalytic Oxidation by Monolayer Oxide Catalysts

建议题目：单层氧化物催化氧化机理的模型研究建议编号：CTS-0000283主要研究员：Robert Madix研究所：斯坦福大学本项目的目的是加深对混合金属氧化物的生长和化学活性的基本了解，混合金属氧化物是重要的催化材料。模型单晶氧化物表面将被用作载体，并将利用一些表面科学工具来制备和研究载体氧化物。特别是，将研究二氧化钛和氧化铝单晶表面以亚单层到单层覆盖层负载的钒。负载型钒将通过化学气相沉积和浸泡在水溶液中生长。用扫描隧道显微镜研究载体氧化物的生长形态和结构。电子结构将通过光电子和电子能量损失谱进行研究。相关的表面反应性将通过程序升温方法和稳态反应技术进行检测。甲醇氧化和丁烯还原将被用作测试反应。大量的商用多相催化剂都是以负载型钒物种为基础的，这项工作有可能指导钒和其他负载型氧化物催化剂的制备和开发。

AbstractProposal Title: Model Studies of the Mechanism of Catalytic Oxidation by Monolayer Oxide CatalystsProposal Number: CTS-0000283Principal Investigator: Robert MadixInstitution: Stanford UniversityThe goal of this project is to further fundamental understanding of the growth and chemical activity of mixed metal oxides, which are important catalytic materials. Model single crystal oxide surfaces will be used as supports, and supported oxide will be fabricated and studied using a number of surface science tools. In particular, vanadia supported on titania and alumina single crystal surfaces at submonolayer to monolayer coverages will be studied. Supported vanadia will be grown using chemical vapor deposition and immersion in aqueous solution. The growth morphology and structure of the supported oxide will be studied by scanning tunneling microscopy. The electronic structure will be studied by photoelectron and electron energy loss spectroscopy. Related surface reactivity will be examined by both temperature programmed methods and by steady state reaction techniques. Methanol oxidation and butene reduction will be used as test reactions. A large number of commercial heterogeneous catalysts are based on supported vanadia species, and this work has the potential to guide the preparation and development of vanadia and other supported oxide catalysts.