Influence of Ce addition and Pt loading upon the catalytic properties of modified mesoporous PtTi-SBA-15 in total oxidation reactions

[Display omitted] •Effect of ceria on Ti and Pt species and their dispersion on mesoporous SBA-15 support.•The co-solvent method used inTi-SBA-15 synthesis modified morphology, Ti and Pt dispersion on support.•Order of Ce and Pt impregnation modified significantly the catalytic results in oxidation of CH4, C3H8 and C6H14.•Pt loading increased conversion in oxidation of hydrocarbons but insignificant effect was evidenced in CO oxidation.•An opposite effect of Pt and Ce immobilization order has been shown for the oxidation of hydrocarbons compared to that of CO. A series of PtCeTi-SBA-15 catalysts, with different concentrations of Pt (0.25 %, 0.5 %, 1.0 %), were synthesized. New Ti-SBA-15 material was obtained by direct synthesis and used as support in successive immobilization of Pt and Ce precursors, changing their order of addition. The characterization of the catalysts has been achieved taking an ensemble of techniques which showed preservation of the support porous structure, high dispersion of the amorphous metal oxides and Pt°, the formation of metal crystals for samples with 1wt% Pt and variation of Pt° content on surface in condition of ceria addition. The best conversion (100 %) was obtained in oxidation of hydrocarbons (CH4, C3H8 and C6H14) for the samples with 1% Pt and a significant diminish of activity was obtained for catalyst in which Ce was added on PtTi-SBA-15 sample. Differently of these, CO oxidation was totally irrespective of the catalyst composition.