Preprint Article Version 1 This version is not peer-reviewed

Supported Bimetallic AuPd Nanoparticles as Catalyst for the Solvent-Free Selective Hydrogenation of Nitroarenes

Version 1 : Received: 5 August 2018 / Approved: 5 August 2018 / Online: 5 August 2018 (23:00:14 CEST)

A peer-reviewed article of this Preprint also exists.

Qu, R.; Macino, M.; Iqbal, S.; Gao, X.; He, Q.; Hutchings, G.J.; Sankar, M. Supported Bimetallic AuPd Nanoparticles as a Catalyst for the Selective Hydrogenation of Nitroarenes. Nanomaterials 2018, 8, 690. Qu, R.; Macino, M.; Iqbal, S.; Gao, X.; He, Q.; Hutchings, G.J.; Sankar, M. Supported Bimetallic AuPd Nanoparticles as a Catalyst for the Selective Hydrogenation of Nitroarenes. Nanomaterials 2018, 8, 690.

Journal reference: Nanomaterials 2018, 8, 690
DOI: 10.3390/nano8090690

Abstract

Selective hydrogenation of nitrobenzene was carried out under solvent-free conditions using supported AuPd nanoparticles catalyst, prepared by modified impregnation method (MIm), as efficient catalyst. >99% yield of aniline (AN) was obtained after 15 hours at 90 °C, 3 bar H2 that can be used without any further purification or separation, therefore reducing cost and energy input. Supported AuPd nanoparticles catalyst, prepared by MIm, was found to be active and stable even after 4 recycle experiments whereas the same catalyst prepared by SIm deactivated during the recycle experiments. The most effective catalyst was tested for the chemoselective hydrogenation of 4-chloronitrobenzene (CNB) to 4-chloroaniline (CAN). The activation energy of CNB to CAN was found to be 25 kJ mol-1, while that of CNB to AN was found to be 31 kJ mol-1. Based on this, the yield of CAN was maximized (92%) by lowering the reaction temperature to 25 °C.

Subject Areas

bimetallic nanoparticles, solvent free hydrogenation, nitrobenzene and chloronitrobenzene.

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