Magnetic FeO@SiO-Pt and FeO@SiO-Pt@SiO Structures for HDN of Indole.

The effect of a second porous SiO shell in the activity and selectivity of the FeO@SiO-Pt catalyst in the hydrodenitrogenation of indole is reported. The double FeO@SiO-Pt@SiO structure was prepared by coating FeO nanoparticles with tetraethyl orthosilicate (TEOS) with a further impregnation of 1.0 wt.

Magnetic Fe₂O₃⁻SiO₂⁻MeO₂⁻Pt (Me = Ti, Sn, Ce) as Catalysts for the Selective Hydrogenation of Cinnamaldehyde. Effect of the Nature of the Metal Oxide.

The type of metal oxide affects the activity and selectivity of Fe₂O₃⁻SiO₂⁻MeO₂⁻Pt (Me = Ti, Sn, Ce) catalysts on the hydrogenation of cinnamaldehyde. The double shell structure design is thought to protect the magnetic Fe₂O₃ cores, and also act as a platform for depositing a second shell of TiO₂, SnO₂ or CeO₂ metal oxide. To obtain a homogeneous metallic dispersion, the incorporation of 5 wt % of Pt was carried out over Fe₂O₃⁻SiO₂⁻MeO₂ (Me = Ti, Sn, Ce) structures modified with (3-aminopropyl)triethoxysilane by successive impregnation-reduction cycles.