Citral hydrogenation on high surface area mesoporous TiO2-SiO2 supported Pt nanocomposites: Effect of titanium loading and reduction temperature on the catalytic performances

M. Bidaoui (1, 2) , Catherine Especel (1) , N. Bouchenafa-Saib (2) , D. Duprez (1) , O. Mohammedi (2) , S. Royer (1)

1 IC2MP [Poitiers] - Institut de chimie des milieux et matériaux de Poitiers [UMR 7285]
2 LCPM - Laboratoire de Chimie Physique Macromoléculaire

Platinum-based catalysts supported on TiO2-modified mesostructured silica were prepared using the direct co-condensation of silica and titania precursors to synthesize the mixed-oxide support. The physico-chemical properties of the Pt/xTi-SBA15 samples with various xTi contents (in mol%) were further evaluated using several techniques, including elemental analysis, X-ray diffraction, N-2-physisorption, H-2-chemisorption, transmission electronic microscopy and the probe reaction of cyclohexane dehydrogenation to evaluate the metal-support interaction (SMSI effect). All the Pt/xTi-SBA15 samples display high specific surface areas (650-820 m(2) g(-1)) and high mesopore volumes (0.44-0.68 cm(3) g(-1)), with the formation of TiO2 anatase nanoparticles since the low titanium content, i.e. 2 mol%. The hexagonal organized pore structure of SBA silica is also strongly altered by the titanium adding, but mixed oxides so obtained present very particular morphology with maintaining of high surface areas.

Domaines: Catalyse; Chimie organique; Autre

M. Bidaoui, Catherine Especel, N. Bouchenafa-Saib, D. Duprez, O. Mohammedi, et al.. Citral hydrogenation on high surface area mesoporous TiO2-SiO2 supported Pt nanocomposites: Effect of titanium loading and reduction temperature on the catalytic performances. Applied Catalysis A : General, 2012, 445, pp.14-25. ⟨10.1016/j.apcata.2012.07.023⟩. ⟨hal-00805641⟩