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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/56871

Title: An XPS Study of the Oxidation of Reduced Ceria-Lanthana Nanocrystals
Author: HOLMES, JUSTIN DEREK
Sponsor: 
Name Grant Number
07/SRC/B1155

Author's Homepage: http://people.tcd.ie/holmesjd
Keywords: Physical chemistry
nanocrystals
Issue Date: 2011
Publisher: Elsevier
Citation: P. Fleming, S. Ramirez, J.D. Holmes, M.A. Morris, An XPS Study of the Oxidation of Reduced Ceria-Lanthana Nanocrystals, Chemical Physics Letters, 509, 1-3, 2011, 51-57
Series/Report no.: Chemical Physics Letters;
509;
1-3;
Abstract: Detailed x-ray photoelectron spectroscopy (XPS) studies on the oxidation of an extensivley cleaned, reduced ceria-lanthana solid solution (12.5 mol% La to Ce) was performed. Uptake of oxygen during oxidation followed a logarithmic dependence on exposure. Differential charging during oxidation suggests that the oxidation process is diffusion limited. No evidence for surface 3+ cerium states in the fully oxidised samples, which are anion defect free within the limits of experimental accuracy, was found. The data suggest that there is no evidence for the inherent stability of anion vacancies (associated with Ce3+ sites) at the surface of these nanocrystals.
Description: PUBLISHED
URI: http://hdl.handle.net/2262/56871
Related links: http://dx.doi.org/10.1016/j.cplett.2011.04.090
Appears in Collections:Physics (Scholarly Publications)

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