Compositional heterogeneity in ceria-based mixed oxides observed by x-ray photoelectron spectroscopy

Autor:	L. P. Haack, A. M. Straccia, G. W. Graham, C. L. Roe
Rok vydání:	2000
Předmět:	Length scale Diffraction Chemistry Oxide Analytical chemistry Surfaces and Interfaces Electron Condensed Matter Physics Zirconium compounds Surfaces Coatings and Films chemistry.chemical_compound X-ray photoelectron spectroscopy Stoichiometry Linear dimension
Zdroj:	Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 18:1093-1095
ISSN:	1520-8559 0734-2101
Popis:	It is argued that compositional heterogeneity in certain reducible mixed oxides, like Ce1−xZrxO2, can be inferred from a variation in the metals ratio, as measured by x-ray photoelectron spectroscopy, between fully oxidized and partially reduced states of the oxide, provided that the characteristic linear dimension of the heterogeneity is at least as large as the typical electron inelastic mean-free path. The argument is supported by experimental results from two examples involving mixed phases, one in which the length scale is 100 nm and the other in which the domains are too small for detection by standard x-ray diffraction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7c5ce8d4c0bd994906ed0a112fc0d42b https://doi.org/10.1116/1.582305 Zobrazit plný text záznamu