Synthesis of platinum nanoparticles in microemulsions and their catalytic activity for the oxidation of carbon monoxide

Yadav, Om Prakash; Palmqvist, Anders; Cruise, Neil; Holmberg, Krister

doi:10.1016/s0927-7757(03)00141-9

Cited by 60 publications

(36 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microemulsions (mEs) are used as excellent mediums to synthesize Pt-metal catalysts due to the simple control of the size and shape of the nanoparticles [10][11][12][13] by adjusting parameters such as the water to surfactant ratio (u), kind of surfactant, kind of precursor, initial concentration of metal salt, etc. The fundamental aspect of the synthesis of nanostructures using reverse micelle mE is in the collision and exchange of water droplets as depicted in Fig.…”

Section: Introductionmentioning

confidence: 99%

A new method to synthesize very active and stable supported metal Pt catalysts: thermo-destabilization of microemulsions

et al. 2012

View full text Add to dashboard Cite

A new technique to deposit nanoparticles synthesized in reverse micellar microemulsions onto support material without agglomeration is named thermal destabilization of microemulsion. The multifaceted Pt crystals, mostly truncated octahedra, were produced inside reverse micelles with an average size of 2.5 nm and a narrow size distribution. After deposition, the Pt crystals were found to be well dispersed on the support with an average size of 2.5 nm. After testing with hydrogenation of a-methyl styrene, the produced Pt-catalyst showed higher activity (6 times higher) and stability than commercial ones. The advantages of this synthesis route of nanoparticles include simple operation, and the ease of controlling the size and shape of nanoparticles without using capping agents.

show abstract

Section: Introductionmentioning

confidence: 99%

A new method to synthesize very active and stable supported metal Pt catalysts: thermo-destabilization of microemulsions

et al. 2012

View full text Add to dashboard Cite

show abstract

“…5,6 The most common method used to synthesize platinum group metal nanoparticles is chemical reduction in a solution using hydrogen gas, [7][8][9][10][11][12][13] alcohols, [14][15][16][17][18][19][20] ethylene glycol, 21 various hydrides [22][23][24] or other reducing agents. 25,26 Platinum group metal nanoparticles can also be produced by electrochemical reduction, 27,28 laser ablation of a platinum metal plate, 29 microemulsion method, 30 aerosol assisted deposition method 31 or partial dissolution of Au-Pt nanoalloys. 32 In our previous work 33 we reported on a novel route for the synthesis of the nanosize particles of metallic palladium based on the precipitation of palladium hydroxide or oxide particles with tetramethylammonium hydroxide (TMAH) at high pH value followed by the hydrothermal processing of the suspensions obtained.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Platinum Group Metal Nanoparticles

Krehula¹,

Musić²

2011

Croat. Chem. Acta

View full text Add to dashboard Cite

Abstract. A novel route for the synthesis of platinum group metal nanoparticles has been reported. The synthesis is based on the addition of tetramethylammonium hydroxide (TMAH) to the aqueous PtCl 4 , IrCl 3 or Rh(NO 3 ) 3 solution followed by the hydrothermal treatment of these precipitation systems at 160 ºC. The mean size of nanoparticles was 9.2 nm for platinum, 21 nm for iridium, and 28 nm for rhodium. The average crystallite size was estimated at 7.4 nm for platinum, 3.1 nm for iridium and 3.5 nm for rhodium. The possible mechanism of platinum group metal nanoparticles formation is briefly discussed. (doi: 10.5562/cca1856)

show abstract

“…Nanoparticles also may be deposited onto solid support by mixing the ME with a support. This step is usually followed by calcination [12,16,17,21,[31][32][33][34][35][36][37][38][39][40][41]. However, these heterogeneous catalysts can be hardly applied for size effect studies because of specific particlesupport interactions [21] and the sintering of the particles at high temperatures during the calcination step.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of monodispersed palladium nanoparticles to study structure sensitivity of solvent-free selective hydrogenation of 2-methyl-3-butyn-2-ol

Semagina

Renken

Laub

et al. 2007

Journal of Catalysis

112

View full text Add to dashboard Cite

A novel method for isolation of monodispersed Pd nanoparticles from a reverse microemulsion was developed using hydrocarbon evaporation and methanol-assisted particle purification from a surfactant. Fcc Pd nanoparticles of 6, 8, 11, and 13 nm in diameter were isolated from water/ AOT/isooctane mixture and used to study a size effect during solvent-free hydrogenation of 2-methyl-3-butyn-2-ol to 2-methyl-3-buten-2-ol. The initial TOF calculated per mole of surface palladium atoms was duplicated when particle size was increased from 6 to 13 nm but remained constant when accounted per number of specific Pd atoms on Pd(111) facets. Selectivity to olefinic alcohol was not size-dependent, but an increase in particle size decreased the byproduct ratio of dimers to saturated alcohol. Acetylenic alcohol hydrogenation is shown to be a structure-sensitive but size-independent reaction for Pd particles with size of 6-13 nm. The work shows also that the Pd size controlled the reaction rate and the byproduct distribution.

show abstract

Synthesis of platinum nanoparticles in microemulsions and their catalytic activity for the oxidation of carbon monoxide

Cited by 60 publications

References 10 publications

A new method to synthesize very active and stable supported metal Pt catalysts: thermo-destabilization of microemulsions

A new method to synthesize very active and stable supported metal Pt catalysts: thermo-destabilization of microemulsions

Hydrothermal Synthesis of Platinum Group Metal Nanoparticles

Synthesis of monodispersed palladium nanoparticles to study structure sensitivity of solvent-free selective hydrogenation of 2-methyl-3-butyn-2-ol

Contact Info

Product

Resources

About