Ensemble Effects in Catalytic Hydrocarbon Conversion Reactions on Pt(111)

在这个由分析和表面化学计划支持的项目中，坎贝尔教授将研究由铂催化的表面反应中的系综效应。使用铋原子作为随机的、电子中性的位点阻滞剂，可以测定环己烯加氢和环己烷脱氢和氢解所必需的铂位点的大小。这项工作的总体目标是为铂表面的这些催化反应建立一个逐步的动力学模型。这种微观信息对于详细了解多相催化是必不可少的。对铂上烃类转化化学催化活性位点的详细微观认识，对于设计用于石油炼制工业的有效催化剂是重要的。本课题利用铋原子吸附法探测模型铂催化剂上烃类反应的活性位点，以期了解这种非均相化学的微观细节。

In this project, supported by the Analytical and Surface Chemistry Program, Professor Campbell will study ensemble effects in surface reactions catalyzed by platinum. The use of bismuth atoms as random, electronically neutral site blockers allows the determination of the size of the platinum site necessary for the hydrogenation of cyclohexene and the dehydrogenation and hydrogenolysis of cyclohexane. The overall goal of this work is to develop a stepwise kinetic model for these catalytic reactions on the platinum surface. This sort of microscopic information is essential to a detailed understanding of heterogeneous catalysis. %%% The detailed microscopic understanding of the active site for catalysis of hydrocarbon conversion chemistry on platinum is important for the design of effective catalysts for use in the petroleum refining industry. This research project uses bismuth atom adsorption methods to probe the active site for hydrocarbon reactions on model platinum catalysts with a view to understanding the microscopic details of this heterogeneous chemistry.