Metallosilicate mesoporous catalysts prepared by incorporation of transition metals in the MCM-41 molecular sieves and their catalytic activity in selective oxidation of aromatics (styrene and benzene)

V. Pârvulescu, B. L. Su

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Résumé

MCM-41 analogue metallosilicates containing the redox active metals V, Co, Cr and Ni or bimetals VCo and CrNi have been synthesized from aqueous gel by hydrothermal treatment. The mono- and bimetallic molecular sieves were characterized by various techniques, such as XRD, N2 adsorption-desorption, SEM, TEM and FTIR spectroscopy. The catalytic activity in the selective oxidation of styrene and benzene with H2O2 has been evaluated. The catalytic properties and the characteristics of the structure were correlated with the synthesis conditions, the nature and concentration of the metal, the association of two metals and their molar ratio in the bimetallic incorporated silicates and the oxidation state of the metal cations in the precursors.

langue originaleAnglais
Pages (de - à)575-584
Nombre de pages10
journalStudies in surface science and catalysis
Volume143
Les DOIs
Etat de la publicationPublié - 1 janv. 2000

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