Hierarchically nanostructured porous group Vb metal oxides from alkoxide precursors and their role in the catalytic remediation of VOCs

Joanna C. Rooke, Tarek Barakat, Julien Brunet, Yu Li, Manuel Franco Finol, Jean François Lamonier, Jean Marc Giraudon, Renaud Cousin, Stéphane Siffert, Bao Lian Su

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Résumé

This study reveals how the textural properties of hierarchically porous group Vb metal oxides, prepared via a spontaneous auto-formation process, can strongly depend upon the pH of the reaction media, with an acidic media increasing the specific surface of Nb2O5 whereas a basic medium results in the highest specific surface for Ta2O5. Catalytic oxidation of toluene over Pd loaded hierarchically porous group Vb systems, and the supports alone, has shown that supports synthesised at pH 6 are the most active, despite having lower specific surfaces, thus implying modifications to the surface chemistry in the presence of H+ or OH- can affect the overall performance of the supported catalytic system.

langue originaleAnglais
Pages (de - à)300-309
Nombre de pages10
journalApplied Catalysis B: Environmental
Volume162
Les DOIs
Etat de la publicationPublié - 1 janv. 2015

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