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Materials 2016, 9(7), 550; doi:10.3390/ma9070550

Bimetallic Nanoparticles as Efficient Catalysts: Facile and Green Microwave Synthesis

1
ISTEC-CNR, Institute of Science and Technology for Ceramics, National Research Council, Via Granarolo 64, Faenza 48018, Italy
2
Department Industrial Chemistry “Toso Montanari”, Bologna University, Viale Risorgimento 4, Bologna 40136, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Nikolaos Dimitratos
Received: 13 June 2016 / Revised: 1 July 2016 / Accepted: 4 July 2016 / Published: 8 July 2016
(This article belongs to the Special Issue Nanoparticle Synthesis and Applications in Catalysis)

Abstract

This work deals with the development of a green and versatile synthesis of stable mono- and bi-metallic colloids by means of microwave heating and exploiting ecofriendly reagents: water as the solvent, glucose as a mild and non-toxic reducer and polyvinylpirrolidone (PVP) as the chelating agent. Particle size-control, total reaction yield and long-term stability of colloids were achieved with this method of preparation. All of the materials were tested as effective catalysts in the reduction of p-nitrophenol in the presence of NaBH4 as the probe reaction. A synergistic positive effect of the bimetallic phase was assessed for Au/Cu and Pd/Au alloy nanoparticles, the latter showing the highest catalytic performance. Moreover, monoand bi-metallic colloids were used to prepare TiO2- and CeO2-supported catalysts for the liquid phase oxidation of 5-hydroxymethylfufural (HMF) to 2,5-furandicarboxylic acid (FDCA). The use of Au/Cu and Au/Pd bimetallic catalysts led to an increase in FDCA selectivity. Finally, preformed Pd/Cu nanoparticles were incorporated into the structure of MCM-41-silica. The resulting Pd/Cu MCM-41 catalysts were tested in the hydrodechlorination of CF3OCFClCF2Cl to CF3OCF=CF2. The effect of Cu on the hydrogenating properties of Pd was demonstrated. View Full-Text
Keywords: Au/Cu; Pd/Au; Pd/Cu; nanosols; microwave-assisted synthesis; supported catalysts; HMF; hydrodechlorination Au/Cu; Pd/Au; Pd/Cu; nanosols; microwave-assisted synthesis; supported catalysts; HMF; hydrodechlorination
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Blosi, M.; Ortelli, S.; Costa, A.L.; Dondi, M.; Lolli, A.; Andreoli, S.; Benito, P.; Albonetti, S. Bimetallic Nanoparticles as Efficient Catalysts: Facile and Green Microwave Synthesis. Materials 2016, 9, 550.

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