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Synthesis of highly active rGO-supported mono and bi-metallic nanocomposites as catalysts for chemoselective hydrogenation of α,β-unsaturated ketone to alcohol

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Abstract

Herein, highly active reduced graphene oxide (rGO)-supported mono (Au/rGO and Pd/rGO) and bi-metallic (Cu–Au/rGO and Cu–Pd/rGO) nanocomposite (NC) catalysts were synthesized by a simple chemical reduction method. Both mono and bi-metallic NC catalysts were analyzed using different characterization techniques such as field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HR-TEM), energy dispersive X-ray spectroscopy (EDX), Raman spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analyses. The surface morphology and microstructural results revealed that the mono (Au/rGO and Pd/rGO) and bi-metallic (Cu–Au/rGO and Cu–Pd/rGO) nanoparticles (NPs) were well dispersed on rGO nanosheets through a charge transfer phenomenon between rGO and mono & bi-metallic NPs. Moreover, the catalytic activity performances of newly prepared mono and bi-metallic NC catalysts were studied towards the chemoselective hydrogenation of an α,β-unsaturated ketone to an alcohol. The observed catalytic activity results revealed that the bi-metallic Cu–Pd/rGO NC catalyst showed a higher conversion yield (100%), reusability (upto three cycles), and good selectivity than Cu–Au/rGO as well as mono-metallic (Pd/rGO, Au/rGO) NCs.

Graphical abstract: Synthesis of highly active rGO-supported mono and bi-metallic nanocomposites as catalysts for chemoselective hydrogenation of α,β-unsaturated ketone to alcohol

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Publication details

The article was received on 21 Jul 2017, accepted on 11 Dec 2017 and first published on 05 Jan 2018


Article type: Paper
DOI: 10.1039/C7NJ02669B
Citation: New J. Chem., 2018, Advance Article
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    Synthesis of highly active rGO-supported mono and bi-metallic nanocomposites as catalysts for chemoselective hydrogenation of α,β-unsaturated ketone to alcohol

    K. Sivaranjan, O. Padmaraj and J. Santhanalakshmi, New J. Chem., 2018, Advance Article , DOI: 10.1039/C7NJ02669B

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