Phosphotungstic acid supported on a nanopowdered ZrO2 as a filler in Nafion-based membranes for polymer electrolyte fuel cells (Articolo in rivista)

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  • Phosphotungstic acid supported on a nanopowdered ZrO2 as a filler in Nafion-based membranes for polymer electrolyte fuel cells (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/fuce.200800009 (literal)
Alternative label
  • A. Saccà; A. Carbone; R. Pedicini; M. Marrony; R. Barrera; M. Elomaa; and E. Passalacqua (2008)
    Phosphotungstic acid supported on a nanopowdered ZrO2 as a filler in Nafion-based membranes for polymer electrolyte fuel cells
    in Fuel cells (Weinh., Print); Wiley-VCH Verlag, GmbH, Weinheim (Germania)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • A. Saccà; A. Carbone; R. Pedicini; M. Marrony; R. Barrera; M. Elomaa; and E. Passalacqua (literal)
Pagina inizio
  • 225 (literal)
Pagina fine
  • 235 (literal)
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  • 08 (literal)
Rivista
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  • 11 (literal)
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  • 3-4 (literal)
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  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
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  • ITAE-CNR (literal)
Titolo
  • Phosphotungstic acid supported on a nanopowdered ZrO2 as a filler in Nafion-based membranes for polymer electrolyte fuel cells (literal)
Abstract
  • An inorganic filler prepared by impregnation of phosphotungstic heteropolyacid on zirconia (HPW/Zr) was developed to be inserted into a perfluorosulphonic polymer matrix for a polymer electrolyte fuel cell (PEFC) operating at a medium temperature (80-120 ?C) and low relative humidity (RH). Two different phosphotungstic acid (PWA) loadings (30 and 45% w/w) were anchored on a nanopowdered ZrO2. Such compounds were characterised by different techniques: differential scanning calorimetry (DSC), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX) and porosity and surface area by Brunauer-Emmett-Teller (BET), to verify the introduction and anchorage of PWA on ZrO2. Two composite Nafion membranes were prepared and characterised in terms of chemical-physical characteristics and electrochemical tests. Thermogravimetric analysis (TGA) provided evidence that HPW/Zr had been incorporated into composite membranes and it was not eluted. A good proton conductivity of about 6x10-3 S cm-1 at 120° ?C and 25% RH was recorded. Accelerated in situ ageing tests highlighted a good electrochemical stability (more than 150 cycles at 90°?C with dry gases) of the composite membranes with a slow decay and a reasonable integrity of the analysed membrane-electrodes assembly (MEA). Finally, a post-mortem SEM-EDX analysis on MEAs confirmed the presence of HPW/Zr in the membrane after the in situ testing. (literal)
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