GOALI: Highly Dispersed Supported Bimetallic Catalysts: Preparation, Structure, and Performance

摘要CTS-9529455 这是加州大学戴维斯分校和福特汽车公司之间的合作研究成果。 这是一种新型的负载型金属催化剂的研究，它由贵金属（铂或钯）通过与亲氧金属（铬，钼或钨）的强相互作用结合到氧化物载体（氧化镁，氧化铝或二氧化硅）上组成。 目的是在小于1纳米的簇中保持高分散。 该催化剂由有机金属簇制备，其中贵金属和亲氧金属彼此键合。 负载的双金属结构在结构上表征并用于催化一系列测试反应，包括 正己烷脱氢环化、3-甲基-2-丁烯醛氢化和选择性一氧化氮还原。 一个实际的目标是建立这些催化剂的稳定性限制相对于温度和组成的反应气体流，并最终奠定了基础，为合理设计的负载型催化剂。 双金属催化剂用于许多非常苛刻的工业和环境应用中，包括液体燃料生产、合成气转化和汽车排气控制。 这一努力为具有更好选择性和更长寿命的新一代催化剂奠定了基础。

ABSTRACT CTS-9529455 This is a cooperative research effort between the University of California at Davis and the Ford Motor Company. It is an investigation of a new class of supported metal catalyst consisting of a noble metal (platinum or palladium) bonded to an oxide support (magnesia, alumina, or silica) by means of a strong interaction with an oxophilic metal (chromium, molybdenum, or tungsten). The intent is to maintain high dispersion in clusters smaller than one nanometer. The catalysts are prepared from organmetallic clusters in which the noble and oxophilic metals are bonded to each other. The supported bimetallic structures are characterized structurally and used to catalyze a series of test reactions including n-hexane dehydrocyclization, 3-methyl-2-butenal hydrogenation, and selective nitric oxide reduction. A practical goal is the establishment of stability limits for these catalysts with respect to temperature and composition of the reactant gas stream, and to ultimately lay down a foundation for the rational design of supported bimetallic catalysts. Bimetallic catalysts are used in a number of very demanding industrial and environmental applications including liquid fuels production, synthesis gas conversion, and automotive exhaust control. This effort lays the groundwork for a new generation of catalysts with better selectivity and longer life.