CeO2/YSZ nanocomposite powders, characterized by increasing Ce/Zr atomic ratio, were obtained by depositing, by wet impregnation, different amounts of CeO2 on the yttria-stabilized zirconia (YSZ) surface. These powders were characterized by means of X-ray photoelectron spectroscopy, transmission electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. Experimental results allow us to obtain interesting information concerning the growth mode, the morphology, and the dimensions of the CeO2 clusters on the YSZ supporting surface. A 3-D growing mechanism was observed for the CeO2 nanoparticles. With increasing Ce/Zr atomic ratio the CeO2 clusters become more and more spherical. Moreover, XPS data also show the presence of Ce(III) and Ce(IV) ions at the interface supported/supporting oxides.
Nanostructured oxide-based powders: investigation of the growth mode of the CeO2 clusters on the YSZ surface
GLISENTI, ANTONELLA
2006
Abstract
CeO2/YSZ nanocomposite powders, characterized by increasing Ce/Zr atomic ratio, were obtained by depositing, by wet impregnation, different amounts of CeO2 on the yttria-stabilized zirconia (YSZ) surface. These powders were characterized by means of X-ray photoelectron spectroscopy, transmission electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. Experimental results allow us to obtain interesting information concerning the growth mode, the morphology, and the dimensions of the CeO2 clusters on the YSZ supporting surface. A 3-D growing mechanism was observed for the CeO2 nanoparticles. With increasing Ce/Zr atomic ratio the CeO2 clusters become more and more spherical. Moreover, XPS data also show the presence of Ce(III) and Ce(IV) ions at the interface supported/supporting oxides.
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