Hybrid materials of platinum nanoparticles and thiol-functionalized graphene derivatives

“…The loading of Pt-NPs on thiol-functionalized TRGO ranged from 3.2 to 8.8 wt-% with particle diameters determined by TEM being 2.5 ± 0.9 to 9 ± 4 nm (Fig. 12) [149,150].…”

Section: Preparation Of M-np@support Hybrid Materials In Ilsmentioning

confidence: 99%

Ionic Liquids for the Synthesis and Stabilization of Metal Nanoparticles

Janiak

2013

Zeitschrift Für Naturforschung B

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131

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The synthesis and stabilization of metal nanoparticles (M-NPs) from metals, metal salts, metal complexes and metal carbonyls in ionic liquids (ILs) is reviewed. The electrostatic and steric properties of ionic liquids allow for the stabilization of M-NPs without the need of additional stabilizers, surfactants or capping ligands. The synthesis of M-NPs in ILs can be carried out by chemical or electroreduction, thermolysis and photochemical methods including decomposition by microwave or sono-/ultrasound irradiation. Gas-phase syntheses can use sputtering, plasma/glow-discharge electrolysis and physical vapor deposition or electron beam and γ-irradiation. Metal carbonyl precursors M x (CO) y contain the metal atoms already in the zero-valent oxidation state needed for M-NPs so that no extra reducing agent is necessary. Microwave-induced thermal decomposition of precursors in ILs is a rapid and energy-saving access to M-NPs because of the significant absorption efficiency of ILs for microwave energy due to their ionic charge, high polarity and high dielectric constant. M-NP/IL dispersions can be applied in catalytic reactions, e. g., in C-C coupling or hydrogenation catalysis.

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“…In another study [21], GO annealed at 830°C was ultrasonicated in acetone solution of H 2 PtCl 6 · xH 2 Oe. GO functionalized with thiol groups, dispersed in an ionic liquid and annealed at 400°С was loaded with platinum by the thermal decomposition of methylcyclopentadienyltrimethylplatinum(IV) under microwave irradiation [22]. Typical ionic liquids have a bulky cation (N alkylpyridinium or N,N dialkylimi dazolinium) and a nonbulky anion [23].…”

Section: Resultsmentioning

confidence: 99%

Preparation of platinum-containing hydrogenation catalysts supported on thermally reduced graphite oxide

et al. 2015

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Graphene like materials with an atomic ratio of C/O > 40 have been prepared by calcination of graphite oxide (C/O = 1.46) in an inert atmosphere. Platinum nanoparticles (average size of ~2.0 nm) have been deposited onto the surface of the materials from an aqueous solution of H 2 PtCl 6 · xH 2 O in the presence of pyridine. These particles catalyze the liquid phase hydrogenation of PhNO 2 to PhNH 2 and that of the dou ble bonds in 1 decene and styrene. As a support, the defect containing graphene like material prepared by calcination of graphite oxide at 1000-1050°C for 3 h has certain advantages over graphite oxide reduced by chemical means or by short term heating. This material and catalysts supported on it can be formed as "car bon paper" by vacuum filtration.

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Hybrid materials of platinum nanoparticles and thiol-functionalized graphene derivatives

Cited by 36 publications

References 60 publications

Synthesis of platinum/graphene composites by a polyol method: The role of graphite oxide precursor surface chemistry

Synthesis of platinum/graphene composites by a polyol method: The role of graphite oxide precursor surface chemistry

Ionic Liquids for the Synthesis and Stabilization of Metal Nanoparticles

Preparation of platinum-containing hydrogenation catalysts supported on thermally reduced graphite oxide

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