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Synthesis, stability and electrocatalytic activity of polymer‐stabilized monometallic Pt and bimetallic Pt/Cu core–shell nanoparticles
Author(s) -
Muraviev D. N.,
Macanás J.,
Ruiz P.,
Muñoz M.
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200778132
Subject(s) - bimetallic strip , membrane , materials science , nanocomposite , polymer , chemical engineering , nanoparticle , polymer chemistry , metal , nanoreactor , dimethylformamide , electrochemistry , polyacrylonitrile , chemistry , nanotechnology , electrode , organic chemistry , composite material , biochemistry , engineering , solvent , metallurgy
Abstract In this paper we report the results obtained for inter‐matrix synthesis (IMS) and characterization of monometallic and bimetallic polymer‐stabilized metal nanoparticles (PSMNPs). The IMS procedure is based on the use of appropriately functionalized polymeric membranes as nanoreactors, which allows both synthesis and characterization of the composition and morphology of PSMNPs inside the membranes. The membranes were prepared by using noncrosslinked sulfonated poly(etherether ketone) (SPEEK) of desired degree of sulfonation, which provided insolubility of the polymer in water and solubility in some organic solvents (e.g. dimethylformamide). The IMS of PSMNPs involved loading of the membrane with metal ions or complexes followed by metal reduction inside the membrane resulting in the formation of either monometallic (Cu or Pt) or bimetallic (Pt/Cu) PSMNPs with core–shell structure. The electrocatalytic activity of the PSMNPs was estimated by measuring the electrochemical response of amperometric sensors prepared by using SPEEK‐Pt‐PSMNP and SPEEK‐Pt/Cu‐PSMNP nanocomposite membranes as sensing elements to detect H 2 O 2 . At the same values of Pt loading the response of Pt/Cu‐PSMNP‐based sensors appeared to be far higher than that of sensors modified with Pt‐PSMNP membranes. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)