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

具有高空间和光谱分辨率的模型汽车尾气催化剂的原位研究

• 批准号: 0315412
• 负责人: Ernst Bauer
• 金额: $ 33.1万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-15 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0315412&HistoricalAwards=false
• 关键词: situ; Studies; Model; Automotive; Exhaust

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.

AbstractChe-0315412Bauer/Arizona统计改善了三种方式用于汽车排气补救的催化转化器的操作，这是Bauer教授及其同事在亚利桑那州立大学进行的工作的目标。 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射线光发射显微镜应用于三种催化剂的研究。 在CO，O2，NO和SO2反应物存在的情况下，氧化物支持的贵金属催化剂会在纳米尺度上发生形态学和组成变化，可以使用这些方法对其进行监测。 这些表面动力学和动态研究的结果为这些催化系统的设计提供了理解。为了不断减少汽车排气的排放，必须改善催化转化器技术。 该研究项目在分析和表面化学计划的支持下，介绍了常用三种催化转化器的常用操作的详细动力学。 鲍尔教授和他的同事使用最先进的微观方法，原位研究反应过程以及对操作催化剂的直接监测，正在发展改善催化剂设计所需的基本理解。