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Yan, Xiaoping; Liu, Hanfan; Liew, Kong Yong

doi:10.1039/b103046a

Cited by 197 publications

(109 citation statements)

References 21 publications

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“…PVP is a homo polymer in which the individual units contain amide groups. N and O atoms from PVP form coordination bond with Ru metal clusters, which provides protecting action and stabilize nanoparticles [3]. Also, PVP is known to reduce ruthenium ions.…”

Section: Resultsmentioning

confidence: 99%

“…Ruthenium (Ru) has various valencies (0 to 8 valence) and is not so expensive transition metal; therefore, various useful catalytic reactions for organic synthesis have been explored. Nanoparticles of many metals, such as gold, platinum, palladium, cobalt, rhodium and silver have been studied with a wide variety of experimental techniques [1][2][3]. However, the synthesis of ruthenium nanoclusters is scarcely reported, despite the important technological role of ruthenium.…”

Section: Introductionmentioning

confidence: 99%

“…Yan et al [3] prepared a series of polymer-stabilized ruthenium nanoparticles with various dimensions by heating or refluxing a polyol solution of Ru (III) salts. They found that the average diameters of Ru nanoparticles could be controlled by changing the polyols, the reduction temperature and the amount of protective polymer.…”

Section: Introductionmentioning

confidence: 99%

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Stability of ruthenium nanoparticles synthesized by solvothermal method

Nandanwar

Chakraborty

Mukhopadhyay

et al. 2011

Cryst. Res. Technol.

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One of the major obstacles to the synthesis of nanoparticles and nanocatalyst is the stability of particles. In the present study, polymer stabilized ruthenium nanoparticles were synthesized by solvothermal method using solutions of ruthenium chloride in ethylene glycol in presence of poly(N-vinyl-2-pyrrolidone) (PVP) as a stabilizing agent. Stability of nanoparticles was studied by varying different parameters e.g. PVP/RuCl 3 molar raio, RuCl 3 concentration, reaction temperature and time and expressed in terms of particle size and size distribution. Transmission electron microscope (TEM) analysis revealed the presence of metallic clusters with a uniform size of about 20-65 nm. Dispersion destabilisation of colloidal nanoparticles was detected by Turbiscan. Polymer stabilized ruthenium nanoparticles were dispersed on γ-alumina to prepare uniformly disperse Ru/γ-Al 2 O 3 catalyst by mechanical strirring and sonication. Inductively coupled plasma-optical emission spectroscopy (ICP-OES), X-Ray powder diffraction (XRD), Transmission electron microscopy (TEM) and Thermo gravimetric analysis (TGA) were used to characterize the supported catalyst.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stability of ruthenium nanoparticles synthesized by solvothermal method

Nandanwar

Chakraborty

Mukhopadhyay

et al. 2011

Cryst. Res. Technol.

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“…The use of polymers for the synthesis of metallic particles, has proven to be an alternate stabilizing agent since they allow better particle size control. Polymers such as polyvinylpyrrolidone (PVP), polyvinyl alcohol and others have been reported to be metal nanoparticles stabilizers [10][11][12][13] . Polysaccharides have been used in the synthesis of nanoparticles [14][15][16] and biopolymers such as chitosan and its derivatives, cellulose, alginate and pectin, are compelling stabilizing agents, due to their excellent synergy and bifunctional expected effects [17][18] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterizations of Metallic Nanoparticles in Chitosan by Chemical Reduction

León¹,

Cárdenas²,

Aguayo³

2017

J. Chil. Chem. Soc.

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SUMMARYOne of the applications of chitosan is based on its ability to stabilized metallic nanoparticles with minimum chitosan metal molar ratio. This work describes the synthesis and characterization of Ag, Au, Pt, and Cu nanoparticles stabilized by chitosan through chemical reduction of metallic salts by sodium borohydride (NaBH 4 ).The properties of bionanocomposites were studied in terms of their surface plasmon resonance, crystalline structure, average diameter size, particle distributions and functional groups. The samples were characterized by TEM, electron diffraction, UV-Visible and FTIR. The stability of the colloids at room temperature were also measured. A high stability for the colloidal dispersion with chitosan can be observed (> three months). We found that TEM studies show a size distribution between 6 and 10 nm, depending on metals and chitosan metal relation. Electron diffraction analysis for the metallic nanoparticles shows the presence of Ag, Au, Pt and Cu. The FT-IR exhibit the presence of the chitosan in the stabilisation of metallic nanoparticles.

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“…Several papers have been recently reported on the use of microwave synthesis to stabilize Pt in a PVP matrix. [29][30][31] Pt-Ru nanoparticles supported on carbon nanotubes have been prepared by microwave synthesis. 32 Microwave heating under dry conditions has been also used to prepare PtRu nanoparticles in graphitic carbon and used as anode catalyst.…”

Section: Introductionmentioning

confidence: 99%

Microwave Synthesis of Polymer-Embedded Pt−Ru Catalyst for Direct Methanol Fuel Cell

et al. 2005

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Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=e86f975e-a999-46cb-9d14-894f9eec6d2a http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=e86f975e-a999-46cb-9d14-894f9eec6d2a Process and EnVironmental Technology, National Research Council of Canada, 1200 Montreal Road, M-12 Ottawa, Ontario K1A 0R6, Canada ReceiVed: April 17, 2005; In Final Form: June 24, 2005 Platinum-ruthenium nanoparticles stabilized within a conductive polymer matrix are prepared using microwave heating. Polypyrrole di(2-ethylhexyl) sulfosuccinate, or PPyDEHS, has been chosen for its known electrical conductivity, thermal stability, and solubility in polar organic solvents. A scalable and quick two-step process is proposed to fabricate alloyed nanoparticles dispersed in PPyDEHS. First a mixture of PPyDEHS and metallic precursors is heated in a microwave under reflux conditions. Then the nanoparticles are extracted by centrifugation. Physical characterization by TEM shows that crystalline and monodisperse alloyed nanoparticles with an average size of 2.8 nm are obtained. Diffraction data show that crystallite size is around 2.0 nm. Methanol electro-oxidation data allow us to propose these novel materials as potential candidates for direct methanol fuel cells (DMFC) application. The observed decrease in sulfur content in the polymer upon incorporation of PtRu nanoparticles may have adversely affected the measured catalytic activity by decreasing the conductivity of PPyDEHS. Higher concentration of polymer leads to lower catalyst activity. Design and synthesis of novel conductive polymers is needed at this point to enhance the catalytic properties of these hybrid materials.

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Untitled

Cited by 197 publications

References 21 publications

Stability of ruthenium nanoparticles synthesized by solvothermal method

Stability of ruthenium nanoparticles synthesized by solvothermal method

Synthesis and Characterizations of Metallic Nanoparticles in Chitosan by Chemical Reduction

Microwave Synthesis of Polymer-Embedded Pt−Ru Catalyst for Direct Methanol Fuel Cell

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