Synthesis of highly active rGO-supported mono and bi-metallic nanocomposites as catalysts for chemoselective hydrogenation of α,β-unsaturated ketone to alcohol
| Autor: | K. Sivaranjan, J. Santhanalakshmi, O. Padmaraj |
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| Rok vydání: | 2018 |
| Předmět: |
Nanocomposite
Chemistry Graphene Nanoparticle 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences law.invention symbols.namesake X-ray photoelectron spectroscopy law Materials Chemistry symbols 0210 nano-technology Selectivity Raman spectroscopy High-resolution transmission electron microscopy Nuclear chemistry |
| Zdroj: | New Journal of Chemistry. 42:1725-1735 |
| ISSN: | 1369-9261 1144-0546 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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