Characterization of CeO2−ZrO2 Mixed Oxides. Comparison of the Citrate and Sol−Gel Preparation Methods
Chemistry of Materials2002Vol. 15(2), pp. 395–403
Citations Over TimeTop 10% of 2002 papers
Abstract
CeO2−ZrO2 mixed oxides were synthesized by two mild chemical routes: complexation with citric acid and the sol−gel method. XRD and ESEM investigations revealed the appearance of a solid solution around 400 °C, depending on the ratio between the two oxides and the preparation method. Solids obtained by the citrate method were more homogeneous on the whole range of composition. Solid-state investigations of the prepared materials did not show segregation of cerium or zirconium oxides, except in the high Ce ranges for samples prepared by the sol−gel method. The thermal stability of both oxides was enhanced by mutual substitution. The most stable solid solutions were obtained in the range 50 < Ce < 90% mol.
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