Selective hydrogenation of o-chloronitrobenzene using supported platinum nanoparticles without solvent

Colloidal platinum nanoparticles with 2.2 nm were immobilized on γ-iron oxide (γ-Fe2O3) powder to make a supported catalyst (Pt/γ-Fe2O3) with controlled Pt nanoparticle size and size distribution. This catalyst was used to catalyze the selective hydrogenation of o-chlorobenzene to o-chloroaniline without using any solvent; 99.9% selectivity at 99.95% conversion was achieved.

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► Nearly monodisperse Pt/γ-Fe2O3 catalysts were prepared by pre-formed Pt colloidal nanoparticles.
► Selective hydrogenation of o-CNB to o-CAN was done at 1542 h−1 without using any solvent.
► 99.9% selectivity to o-CAN at 99.95% conversion of o-CNB was achieved.