Concentration of Ce3+ and Oxygen Vacancies in Cerium Oxide Nanoparticles
Chemistry of Materials2006Vol. 18(21), pp. 5144–5146
Citations Over TimeTop 10% of 2006 papers
Abstract
Temperature variations of the electron magnetic resonance (EMR) spectra and magnetization measurements are used to show that Ce3+ ions in concentration ≃18% are present in 3 nm CeO2 nanoparticles supported on silica aerogel. It is argued that the presence of Ce3+ implies the defect structure CeO2-x for ceria nanoparticles due to oxygen vacancies. This transformation of Ce4+ to Ce3+ driven by oxygen vacancies may be the key to understanding the catalytic properties of ceria.
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