In situ Studies of Model Automotive Exhaust Catalysts with High Spatial and Spectroscopic Resolution

亚利桑那州立大学Bauer教授和他的同事们致力于改善汽车尾气三效催化转化器的运行状况。在分析和表面化学计划的支持下，他正在将低能电子显微镜和X射线光电子显微镜应用于模型三效催化剂的研究。在CO、O2、NO和SO2反应物的存在下，氧化物负载的贵金属催化剂在纳米尺度上发生了形态和组成的变化，这些变化可以用这些方法来监测。这些表面动力学和动力学研究的结果为这些催化系统的改进设计提供了理解。为了不断降低汽车尾气的排放，必须改进催化转化器技术。这项研究项目在分析和表面化学计划的支持下，研究了常用的三效催化转化器的详细操作动力学。利用最先进的显微方法、对反应过程的现场研究以及对运行催化剂的直接监控，鲍尔教授和他的同事们正在发展改进催化剂设计所需的基本理解。

AbstractCHE-0315412Bauer/Arizona StateThe improvement of the operation of three way catalytic converters for automobile exhaust remediation is the goal of the work carried out by Professor Bauer and his colleagues at Arizona State University. With the support of the Analytical and Surface Chemistry Program, he is applying low energy electron microscopy and x-ray photoemission microscopy to the study of model three way catalysts. In the presence of CO, O2, NO and SO2 reactants, oxide supported noble metal catalysts undergo morphological and compositional changes on the nanometer scale that can be monitored using these methods. Results of these surface kinetic and dynamic studies provide understanding for the improved design of these catalytic systems. In order to continually reduce the emissions from automobile exhaust, improvements in catalytic converter technology must be made. This research project, supported by the Analytical and Surface Chemistry Program, addresses the detailed dynamics of operation of the commonly used three way catalytic converter. Using state of the art microscopic methods, in situ studies of the reaction process, and direct monitoring of the operational catalyst, Professor Bauer and his coworkers are developing the fundamental understanding needed to improve catalyst design.