ISSN:
1572-9028
Keywords:
metal clusters
;
activity
;
quantum size effects
;
thin film oxides
;
Au
;
Ag
;
TiO2
;
SiO2
;
Al2O3
;
TPD
;
XPS
;
LEIS
;
STM
;
STS
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1009059100646
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