Modeling Heterogeneous Catalysts: Metal Clusters on Planar Oxide Supports
The morphology, electronic structure and catalytic properties of these Au and Ag clusters were studied using low-energy ion scattering spectroscopy (LEIS), TPD, XPS, and scanning tunneling microscopy and spectroscopy with emphasis on the unique properties of clusters < 5 nm in size. Gold supported on TiO2 was active for various reactions including low-temperature CO oxidation and the selective oxidation of propylene. A correlation was observed between Au clusters size and catalytic activity for CO oxidation on Au/TiO2 (110)-(1 × 1). The activity of the Au/TiO2 catalyst exhibited a maximum 1.90 turnover frequency at an average Au cluster diameter of ∼ 3.5 nm, decreasing with larger diameter.
C. C. Chusuei et al., "Modeling Heterogeneous Catalysts: Metal Clusters on Planar Oxide Supports," Topics in Catalysis, Springer Verlag, Jan 2001.
The definitive version is available at http://dx.doi.org/10.1023/A:1009059100646
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