Molecular design of supported metal oxide

Surface Oxide—Support Interactions in the Molecular Design of Supported Metal Oxide Selective Oxidation Catalysts... 

The molecular design of supported metal oxide catalysts requires that we specify the synthesis method, oxide support, catalyst composition, calcination... 

This chapter focuses on several recent topics of novel catalyst design with metal complexes on oxide surfaces for selective catalysis, such as stQbene epoxidation, asymmetric BINOL synthesis, shape-selective aUcene hydrogenation and selective benzene-to-phenol synthesis, which have been achieved by novel strategies for the creation of active structures at oxide surfaces such as surface isolation and creation of unsaturated Ru complexes, chiral self-dimerization of supported V complexes, molecular imprinting of supported Rh complexes, and in situ synthesis of Re clusters in zeolite pores (Figure 10.1). 

The above discussion demonsi rates that it is possible to molecularly design supported metal oxide catalysts with knowledge of the surface oxide - support interactions made possible by the assistance of characterization methods such as Raman spectroscopy and the methanol oxidation reaction. The formation and location of the surface metal oxide species are controlled by the... 

Raman spectroscopy has made a significant impact on HDS catalysts because it is now recognized that the final state of the supported metal sulfide catalyst is directly related to the initial state of the supported metal oxide catalyst [143]. In other words, the molecular design of HDS catalysts is controlled during the synthesis of the supported metal oxide catalysts, which can be readily monitored with Raman spectroscopy (see Sec. III). 

The supported clusters described in this chapter have strong connections to industrial supported metal catalysts, although the clusters or particles in industrial catalysts are much less uniform and less susceptible to incisive structural characterization than those considered here. Development and further investigation of structurally simple oxide- and zeolite-supported molecular catalysts will provide fundamental understanding of structure-activity relationships that will direct design of novel and improved industrial supported metal catalysts. 

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