Influence of synthesis conditions on the performance of chitosan-Heteropolyacid complexes as membranes for low temperature H<inf>2</inf>-O<inf>2</inf> fuel cell

Monica Santamaria, Francesco Di Quarto, Patrizia Bocchetta, Claudio Maria Pecoraro

Risultato della ricerca: Article

22 Citazioni (Scopus)

Abstract

Flat, free-standing chitosan/phosphotungstic acid (PTA) polyelectrolyte membranes were prepared by in-situ ionotropic gelation process at room temperature on porous alumina support firstly impregnated by H<inf>3</inf>PW<inf>12</inf>O<inf>40</inf>. Scanning electron microscopy revealed the formation of compact and homogeneous membranes, whose thickness resulted to be dependent on chitosan concentration and reticulation time. X-ray diffraction and Fourier transform infrared spectroscopy (FTIR) evidenced the formation of almost amorphous membrane without appreciable concentration of not protonated NH<inf>2</inf> groups and PTA<sup>3-</sup> ions with preserved Keggin structure. Membranes were tested as proton conductor in low temperature H<inf>2</inf>-O<inf>2</inf> fuel cell allowing to get peak power densities up to 300mWcm<sup>-2</sup>. Electrochemical impedance measurements allowed to estimate polyelectrolytes' conductivity up to 28mScm<sup>-1</sup> at room temperature.
Lingua originaleEnglish
pagine (da-a)14616-14626
Numero di pagine11
RivistaInternational Journal of Hydrogen Energy
Volume40
Stato di pubblicazionePublished - 2015

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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