Title

Modeling Heterogeneous Catalysts: Metal Clusters on Planar Oxide Supports

Abstract

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.

Department(s)

Chemistry

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2001 Springer Verlag, All rights reserved.


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