Hybrid inorganic-organic proton conducting membranes based on Nafion and 5 wt% of MxOy (M = Ti, Zr, Hf, Ta and W): part I, synthesis, properties and vibrational studies (Articolo in rivista)

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  • Hybrid inorganic-organic proton conducting membranes based on Nafion and 5 wt% of MxOy (M = Ti, Zr, Hf, Ta and W): part I, synthesis, properties and vibrational studies (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.electacta.2007.05.009 (literal)
Alternative label
  • VITO DI NOTO (a,b), ROCCO GLIUBIZZI (a), ENRICO NEGRO (a), MICHELE VITTADELLO (c), GIUSEPPE PACE (d) (2007)
    Hybrid inorganic-organic proton conducting membranes based on Nafion and 5 wt% of MxOy (M = Ti, Zr, Hf, Ta and W): part I, synthesis, properties and vibrational studies
    in Electrochimica acta
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • VITO DI NOTO (a,b), ROCCO GLIUBIZZI (a), ENRICO NEGRO (a), MICHELE VITTADELLO (c), GIUSEPPE PACE (d) (literal)
Pagina inizio
  • 1618 (literal)
Pagina fine
  • 1627 (literal)
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  • http://www.sciencedirect.com/science/article/pii/S0013468607006573?via=ihub (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 53 (literal)
Rivista
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  • 10 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1,2,3 : Dipartimento di Scienze Chimiche,Università di Padova, Via Marzolo 1, 35131 Padova (Pd), Italy 1 :Istituto di Scienze e Tecnologie Molecolari, ISTM-CNR c/o Dipartimento di Scienze Chimiche, Via Marzolo 1, 35131 Padova (Pd), Italy 4 : Department of Materials Science & Engineering, Rutgers University, 607 Taylor Road, Piscataway, New Jersey, USA 5 :Istituto di Scienze e Tecnologie Molecolari, ISTM-CNR c/o Dipartimento di Processi Chimici dell'Ingegneria, Via Marzolo 9, 35131 Padova (Pd), Italy (literal)
Titolo
  • Hybrid inorganic-organic proton conducting membranes based on Nafion and 5 wt% of MxOy (M = Ti, Zr, Hf, Ta and W): part I, synthesis, properties and vibrational studies (literal)
Abstract
  • This paper describes the effect of nanopowders acting as fillers on the structure and properties of [Nafion/(MxOy)n] membranes with n = 5 wt.%. The films were prepared by a solvent casting procedure using MxOy oxoclusters (M = Ti, Zr, Hf, Ta and W) and Nafion. Five new homogeneous membranes were prepared with thicknesses ranging from 170 to 350 ?m. The membranes were characterized by means of thermal analyses carried out by thermogravimetry (TG), morphological measurements by scanning electron microscopy (ESEM) and vibrational spectroscopy by FT-IR ATR, FT-Raman measurements. Vibrational investigations allowed us to obtain information on: (a) the network structure and the conformation of fluorocarbon hydrophobic domains of the Nafion host polymer, (b) theMxOy· · ·HSO3 R interactions occurring in ionic polar cages of membranes and (c) the various water domains present in the hydrophilic polar cages of membranes. TG allowed us to determine that the membranes are thermally stable up to about 170 oC. In conclusion, itwas disclosed that: (a) the hydrophobic Nafion polymer host domains consist of a blend of PTFE chains with helical conformations 103 and 157 and (b) the fraction of each fluorocarbon helical conformation is modulated by the type of nano-fillers and the dynamic cross-links R SO3H· · ·MxOy· · ·HSO3 R which occur in hydrophilic polar cages of membranes. In hydrophobic domains of Nafion, the highest percentage of fluorocarbon chains with helical conformation 103 is observed for [Nafion/(HfO2)n] composite membrane, ? (%) = 16. © 2007 Elsevier Ltd. All rights reserved. (literal)
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