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

Bauer/Arizona State改进汽车尾气净化用三元催化转化器的操作是亚利桑那州立大学的Bauer教授和他的同事们进行的工作的目标。 在分析和表面化学项目的支持下，他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经历纳米尺度的形态和组成变化，可以使用这些方法监测。 这些表面动力学和动力学研究的结果提供了这些催化系统的改进设计的理解。为了持续降低汽车尾气排放，必须改进催化转化器技术。 该研究项目由分析和表面化学计划支持，解决了常用的三效催化转化器的详细动力学操作。 使用最先进的显微镜方法，反应过程的原位研究和操作催化剂的直接监测，Bauer教授和他的同事正在开发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.