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Modeling heterogeneous catalysts: metal clusters on planar oxide supports

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Abstract

Model catalysts consisting of Au and Ag clusters of varying size have been prepared on single crystal TiO2(110) and ultra-thin films of TiO2, SiO2 and Al2O3. The morphology, electronic structure, and catalytic properties of these Au and Ag clusters have been investigated using low-energy ion scattering spectroscopy (LEIS), temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM) and spectroscopy (STS) with emphasis on the unique properties of clusters <5.0 nm in size. Motivating this work is the recent literature report that gold supported on TiO2 is active for various reactions including low-temperature CO oxidation and the selective oxidation of propylene. These studies illustrate the novel and unique physical and chemical properties of nanosized supported metal clusters.

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  1. Department of Chemistry, Texas A&M University, PO Box 30012, College Station, TX, 77842-3012, USA

    C.C. Chusuei, X. Lai, K. Luo & D.W. Goodman

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  1. C.C. Chusuei
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Chusuei, C., Lai, X., Luo, K. et al. Modeling heterogeneous catalysts: metal clusters on planar oxide supports. Topics in Catalysis 14, 71–83 (2000). https://doi.org/10.1023/A:1009059100646

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