Cation-exchange membrane as nanoreactor: Intermatrix synthesis of platinum–copper core–shell nanoparticles

Muraviev, Dmitri; Macanás, Jorge; Parrondo, Javier; Muñoz, Marı́a; Alonso, Amanda; Alegret, Salvador; Ortueta, M.; Mijangos, Federico

doi:10.1016/j.reactfunctpolym.2007.07.052

Cited by 36 publications

(32 citation statements)

References 40 publications

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“…In the second step, the membrane was loaded with palladium via intermatrix synthesis [30]. The IL-grafted membrane was soaked in a solution of K 2 [PdCl 4 ], where the IL anions (NTf 2 À ) were exchanged by [PdCl 4 ] 2 À .The membrane turned from white color to brown after the ion exchange.…”

Section: Preparation Of the Catalytic Membranementioning

confidence: 99%

High catalytic efficiency of palladium nanoparticles immobilized in a polymer membrane containing poly(ionic liquid) in Suzuki–Miyaura cross-coupling reaction

Favier

Pradel

et al. 2015

Journal of Membrane Science

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International audienceThe elaboration of a polymeric catalytic membrane containing palladium nanoparticles is presented. The membrane was prepared using a photo-grafting process with imidazolium-based ionic liquid monomers as modifying agent and microPES® as support membrane. Ionic liquid serves as a stabilizer and immobilizer for the catalytic species, i.e. palladium nanoparticles. The Suzuki–Miyaura cross-coupling reaction was carried out on the catalytic membrane in flow-through configuration. Complete conversion was achieved in 10 s through one single filtration, without formation of byproducts. The apparent reaction rate constant was three orders of magnitude greater than in a batch reactor. No catalyst leaching was detected. This membrane offers the possibility of continuous production with no need for a separation step of the catalyst from the reaction medium

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Section: Preparation Of the Catalytic Membranementioning

confidence: 99%

High catalytic efficiency of palladium nanoparticles immobilized in a polymer membrane containing poly(ionic liquid) in Suzuki–Miyaura cross-coupling reaction

Favier

Pradel

et al. 2015

Journal of Membrane Science

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“…In the present work, we have loaded the charged groups on the membrane with metal ions and subsequently reduce these ions to obtain metal nanoparticles (MNPs) by inter-matrix synthesis technique [5,11,26]. This method for preparing nanoparticles has already been successfully tested for the development of new electrochemical sensors [27,28].…”

Section: Introductionmentioning

confidence: 99%

Development of polymeric hollow fiber membranes containing catalytic metal nanoparticles

et al. 2010

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Metal Nanoparticles (MNPs) have unique physico-chemical properties advantageous for catalytic applications which differ from bulk material. However, the main drawback of MNPs is their insufficient stability due to a high trend for aggregation. To cope with this inconvenience, the stabilization of MNPs in polymeric matrices has been tested. This procedure is a promising strategy to maintain catalytic properties.The aim of this work is the synthesis of polymer-stabilized MNPs inside functionalized polymeric membranes in order to build catalytic membrane reactors. First, the polymeric support must have functional groups capable to retain nanoparticle precursors (i.e. sulfonic), Then, nanoparticles can grow inside the polymeric matrix by chemical reduction of metal ions.Two different strategies have been used in this work. Firstly, polyethersulfone microfiltration hollow fibres have been modified by applying polyelectrolyte multilayers. Secondly, polysulfone ultrafiltration membranes were modified by UV-photografting using sodium p-styrene sulfonate as a vinyl monomer. The catalytic performance of developed hollow fibers has been evaluated by using the reduction of nitrophenol to aminophenol by sodium borohydride. Hollow fibre modules with Pd MNPs have been tested in dead-end and cross-flow filtration. Complete nitrophenol degradation is possible depending on operation parameters such as applied pressure and permeate flux.

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“…These results can also be explained by considering the above two factors: (i) partial compression of Cu-core after the coating with PGM shell and (ii) partial oxidation of the core in the course of the second load-ing with PGM solution. For Pd, both the value of standard reduction potential, E°(Pd), and that of the surface tension are less than the respective values for Pt [15,26]. Therefore, both effects have to be less pronounced in the case of Pd@Cu-in comparison with Pt@Cu-MNPs.…”

confidence: 89%

“…The second possible reason can be associated with an increase of the interior pressure in bimetallic core-shell nanoparticles compared with that in the monometallic ones [15,24,25]. Synthesis of catalytically active core-shell MNPs is particularly important for two reasons: (i) the smaller size of core-shell PGM-containing MNPs results in the increase of their surface area, which is extremely important for their use in heterogeneous catalysis; and (ii) the cost of core-shell MNPs appears to be far lower than that of their monometallic analogs due to the use of cheap core metals (e.g., Cu, Co, etc.)…”

confidence: 99%

Novel strategies for preparation and characterization of functional polymer-metal nanocomposites for electrochemical applications

Muraviev

Ruíz

Muñoz

et al. 2008

Pure and Applied Chemistry

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Stabilization of metal nanoparticles (MNPs) in polymeric matrices of different types has proven to be one of the most promising strategies to prevent their aggregation and to retain their properties. Polymer-stabilized MNPs (PSMNPs) and those based on polymermetal nanocomposite materials are starting to find wide application in various fields of science and technology. In this paper, we demonstrate that metal-polymer nanocomposite membranes (MPNCMs) containing MNPs can easily be prepared in an ion-exchange such as, for example, sulfonated polyetherether ketone (SPEEK) matrix by using the polymeric membranes as nanoreactors for synthesis and to characterize the composition and structure of the formed MNPs. Metal ions (or metal ion complexes) are first incorporated into the polymeric matrix where they undergo reduction, leading to formation of corresponding MPNCMs. Since this technique allows successive metal loading-reduction cycles to be carried out, it enables synthesis of both monometallic and bimetallic (e.g., core-shell) MNPs. The proposed approach is illustrated by synthesis and characterization of MPNCMs containing both monometallic and bimetallic core-shell MNPs, formed by combinations of Pd, Pt, Co, Ni, and Cu, along with their application in electrochemical sensor and biosensor constructions.

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Cation-exchange membrane as nanoreactor: Intermatrix synthesis of platinum–copper core–shell nanoparticles

Cited by 36 publications

References 40 publications

High catalytic efficiency of palladium nanoparticles immobilized in a polymer membrane containing poly(ionic liquid) in Suzuki–Miyaura cross-coupling reaction

High catalytic efficiency of palladium nanoparticles immobilized in a polymer membrane containing poly(ionic liquid) in Suzuki–Miyaura cross-coupling reaction

Development of polymeric hollow fiber membranes containing catalytic metal nanoparticles

Novel strategies for preparation and characterization of functional polymer-metal nanocomposites for electrochemical applications

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