NSF/CONACyT: Environmental Catalytic Processes

摘要提案题目：NSF-CONACyT环境催化合作研究提案号：cts -0423859首席研究员：Francisco zaere加州大学河滨分校该合作项目由加州大学河滨分校化学系的Francisco Zaera教授和墨西哥国立墨西哥大学（UNAM, Ensenada）凝聚性物质科学中心的Sergio Fuentes教授组成，旨在从分子水平上更好地了解钯基催化剂的性质，以控制汽车排放，特别是减少氮氧化物。城市空气污染是现代社会的一个严重问题，尤其是在洛杉矶和墨西哥城这样的大城市。为了广泛使用催化净化汽车废气，人们希望有更便宜的替代品来取代目前的三元催化剂。这项研究工作将结合Ensenada开发的新型溶胶-凝胶催化剂制备方法和Riverside现有的现代表面科学表征技术，以获得新设计的催化材料的结构-活性相关性。最初的研究选择了基于钯的催化剂和用稀有金属氧化物促进剂修饰的载体：纯钯催化剂已经在某些情况下用于去除污染，但它们的广泛应用受到与所需活性相稳定性相关的问题的阻碍。为了解决这个问题，我们将使用模型系统和溶胶-凝胶合成/表面科学相结合的方法来研究钯颗粒的表面结构和氧化态对催化活性的影响，以及改性剂在稳定负载催化剂中NOx还原所需活性位点方面的作用。该项目的主要技术贡献之一将是为新催化剂的合成和表征提供新的实验方法。催化相关的实验也将被纳入本科和研究生水平的课程和实验室。该项目将加强河滨和Ensenada的催化和表面科学实验室之间的关系。两组之间将进行广泛的人员交流和科学设备共享。将墨西哥研究生纳入加州大学河滨分校的研究工作将有助于从代表性不足的群体中招募美国学生，尤其是西班牙裔美国人。

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.