Artículos de revistas
Deep oxidation of benzene on Pt/V2O5-TiO2 catalysts
Fecha
2009-07Registro en:
Garetto, Teresita Francisca; Avila, Maria Sol; Vignatti, Charito Ivana; Venkat Rao, V.; Chary, Komandur; et al.; Deep oxidation of benzene on Pt/V2O5-TiO2 catalysts; Springer; Catalysis Letters; 130; 3-4; 7-2009; 476-480
1011-372X
1572-879X
CONICET Digital
CONICET
Autor
Garetto, Teresita Francisca
Avila, Maria Sol
Vignatti, Charito Ivana
Venkat Rao, V.
Chary, Komandur
Apesteguia, Carlos Rodolfo
Resumen
The combustion of benzene was studied on Pt supported on V 2O5-TiO2 samples containing different amounts of V2O5. Vanadium was highly dispersed as V4+ for low V2O5 loadings, forming a vanadia monolayer on titanium dioxide for a V2O5 concentration of about 5%wt. V2O5-TiO2 samples were more active than V 2O5 and TiO2 single oxides, and the activity increased with the vanadia content. The platinum dispersion in Pt/V 2O5-TiO2 catalysts increased with the V 2O5 loading but the activity for the deep oxidation of benzene exhibited an opposite trend. Benzene combustion was a structure sensitivity reaction promoted on larger metallic Pt crystallites which were preferentially formed when the V2O5 content in the sample was decreased.