Solvent-free selective aerobic oxidation of toluene by ultra fine nano-palladium catalyst

High activity ultrafine Pd catalyst was synthesized by both functional polymer encapsulated and impregnation methods. Catalysts were characterized and used to catalyze solvent-free aerobic toluene oxidation. Reaction temperature, time, catalyst mass, air pressure and catalyst reusability were investigated. Catalyst synthesized by encapsulating and immobilizing Pd inside titanium oxide is more active and has a better reusability.

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► Nano-size ultrafine Pd catalyst was synthesized in a size controlled way.
► Pd catalysts catalyzed solvent-free aerobic toluene oxidation.
► Pd synthesized by immobilizing method has better performance in reusability.