CINDECA   05422
CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
artículos
Título:
Characterization of alpha-Al2O3 supports modified with CeO2 and ZrO2
Autor/es:
FRANCISCO POMPEO; DELIA GAZZOLI; NORA N. NICHIO
Revista:
MATERIALS LETTERS
Editorial:
Elsevier
Referencias:
Año: 2008
ISSN:
0167-577X
Resumen:
alpha-Al2O3 is a catalytic support adequate by its high stability, availability, and low cost, although it presents as principal disadvantage its limited surface area and reactivity. These disadvantages in the support lead to catalysts of low metallic dispersion and with weak interaction metal-support. According to characterization results obtained in this work, the addition of small amounts of Ce and Zr oxides to alpha-Al2O3 leads to CexZr1-xO2 composites, thus conferring higher reactivity to the surface due to the presence of basic nature sites. This fact together with the well known oxygen storage capacity of these mixed oxides present in composites allow to obtain supports of optimal properties to prevent the sintering and the formation of superficial carbon present in the catalytic deactivation.
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