The study investigates the preparation of high surface area, three-way catalysts (TWC)-like, ceria-zirconia mixed oxide. It is shown that under basic conditions cationic surfactants effectively incorporate into hydrous oxides of cerium and zirconium. The presence of cerium inhibits the action of alkyl-trimethyl-ammonium salts as true templating agents and there is no formation of a regular pore structure, The elimination of surfactants upon calcination gives rise to the formation of high surface area, fluorite-structured CeO2-ZrO2 solid solution characterized by a fairly good compositional homogeneity, Surface areas in excess of 230 m(2)/g were obtained after calcination at 723 K, which drop to ca. 40 m(2)/g following treatment at 1173 K.

The preparation of high surface area CeO2-ZrO2 mixed oxides by a surfactant-assisted approach

TROVARELLI, Alessandro;DE LEITENBURG, Carla;DOLCETTI, Giuliano
1998-01-01

Abstract

The study investigates the preparation of high surface area, three-way catalysts (TWC)-like, ceria-zirconia mixed oxide. It is shown that under basic conditions cationic surfactants effectively incorporate into hydrous oxides of cerium and zirconium. The presence of cerium inhibits the action of alkyl-trimethyl-ammonium salts as true templating agents and there is no formation of a regular pore structure, The elimination of surfactants upon calcination gives rise to the formation of high surface area, fluorite-structured CeO2-ZrO2 solid solution characterized by a fairly good compositional homogeneity, Surface areas in excess of 230 m(2)/g were obtained after calcination at 723 K, which drop to ca. 40 m(2)/g following treatment at 1173 K.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11390/710696
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