NSF/CONACyT: Environmental Catalytic Processes

摘要提案标题：NSF-CONACyT环境催化合作研究提案编号：CTS-0423859主要研究者：弗朗西斯科扎埃拉机构： 加州大学河滨分校这一合作项目涉及加州大学滨江分校化学系的弗朗西斯科Zaera教授和恩塞纳达国立自治大学冷凝物材料科学中心的Sergio Fuentes教授，旨在从分子水平上更好地了解用于汽车排放控制，特别是减少NOx的钯基催化剂的性质。城市空气污染在现代社会中是一个严重的问题，特别是在诸如洛杉矶和墨西哥城的大城市中，并且对于广泛使用的汽车废气的催化净化来说，期望现有三效催化剂的更便宜的替代物。研究工作将结合联合收割机新的溶胶-凝胶催化剂制备方法在恩塞纳达与现代表面科学表征技术在滨江开发，以获得新设计的催化材料的结构活性相关性。基于钯和用稀有金属氧化物促进剂改性的载体的催化剂已被选择用于初始研究：仅钯催化剂已经在某些情况下用于污染去除，但它们的广泛应用受到与所需活性相的稳定性相关的问题的阻碍。为了解决这个问题，钯颗粒的表面结构和氧化态的影响，在定义催化活性和稳定所需的活性位点的改性剂在负载型催化剂中的NOx还原的作用将通过使用模型系统和结合溶胶-凝胶合成/表面科学的方法进行研究。 该项目的主要技术贡献之一将是推进新催化剂合成和表征的新实验方法。 催化相关的实验也将纳入本科和研究生水平的课程和实验室。 该项目将加强滨江和恩塞纳达的催化和表面科学实验室之间的关系。双方将进行广泛的人员交流和科学设备的共享。 将墨西哥研究生纳入加州大学滨江分校的研究工作将有助于从代表性不足的群体，特别是拉美裔美国学生中招募美国学生。

AbstractProposal Title: NSF-CONACyT Collaborative Research on Environmental Catalysis Proposal Number: CTS-0423859Principal Investigator: Francisco ZaeraInstitution: University of California, RiversideThis collaborative project, involving the groups of Professor Francisco Zaera at the Department of Chemistry of the University of California, Riverside and of Professor Sergio Fuentes at the Centro de Ciencias de la Materia Condensada of UNAM, Ensenada, aims to develop a better molecular-level understanding of the nature of palladium-based catalysts for automobile emission control, NOx reduction in particular. Urban air pollution is a severe problem in modern societies, especially in large cities such as Los Angeles and Mexico City, and cheaper alternatives to the current three-way catalysts are desirable for the widespread use of catalytic cleaning of exhaust gases from automobiles. The research effort will combine novel sol-gel catalyst preparation methodologies developed in Ensenada with modern surface-science characterization techniques available at Riverside to obtain structure-activity correlations on newly designed catalytic materials. Catalysts based on palladium and supports modified with rare-metal oxide promoters have been chosen for the initial studies: palladium-only catalysts are already used for pollution removal in some circumstances, but their widespread application has been hampered by problems associated with the stability of the desirable active phases. To address this issue, both the effect of the surface structure and oxidation state of the palladium particles in defining catalytic activity and the role of modifiers in stabilizing desirable active sites for NOx reduction in supported catalysts will be studied by using model systems and a combined sol-gel synthesis/surface-science approach. One of the main broader technological contributions from this project will be the advancement of new experimental approaches for the synthesis and characterization of new catalysts. Catalysis-related experiments will also be incorporated into undergraduate and graduate level classes and laboratories. The project will strengthen the relation between the catalytic and surface science laboratories of Riverside and Ensenada. Both extensive exchanges of personnel and sharing of scientific equipment between the two groups will occur. The incorporation of Mexican graduate students into the research effort at UC Riverside will facilitate efforts in recruiting US students from underrepresented groups, Hispanics in particular.