Departmental Papers (CBE)

Document Type

Journal Article

Date of this Version

November 2005

Abstract

The morphology and reducibility of vapor-deposited ceria films supported on yttria-stabilized zirconia (100) (YSZ(100)) and α-Al2O3(0001) single crystals were studied using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The results of this study show that the gas environment has a significant effect on the structure of the ceria films on both substrates. CeO2 films on α-Al2O3(0001) were found to be stable in a reducing environment at temperatures up to 1000K, but underwent agglomeration and reaction with the support to form CeAlO3 upon annealing at 1273 K in air. Heating CeO2/YSZ(100) in air at 1273 K caused the ceria thin film to agglomerate into bar-shaped features which were re-dispersed by subsequent annealing in vacuum. Interactions at the CeO2-YSZ interface were also found to dramatically enhance the reducibility of ceria films supported on YSZ(100).

Comments

Postprint version. Published in Surface Science, Volume 592, Issues 1-3, November 1, 2005, pages 8-17.
Publisher URL: http://dx.doi.org/10.1016/j.susc.2005.06.029

Keywords

Ceria, Zirconia, Al2O3, X-ray photoelectron spectroscopy, Atomic force microscopy

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Date Posted: 06 April 2006

This document has been peer reviewed.