Phosphomolybdic acid and mixed phosphotungstic/phosphomolybdic acid chitosan membranes as polymer electrolyte for H2/O2fuel cells

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Flat, free-standing phosphomolybdic acid and mixed phosphotungstic/phosphomolybdic acid chitosan membranes were prepared by in-situ ionotropic gelation process at room temperature on porous alumina support firstly impregnated by heteropolyacid. Scanning electron microscopy revealed the formation of compact and homogenous polymeric membranes, whose thickness resulted to be dependent on reticulation time, and almost independent on the employed heteropolyacid nature and concentration. X-ray diffraction and Fourier transform infrared spectroscopy evidenced the formation of crystalline membranes without appreciable concentration of unprotonated NH2groups and heteropolyacid ions with preserved Keggin structure. The polymeric films were tested as proton conductor in low temperature H2âO2fuel cell. Chitosan/phosphomolybdic acid membranes allowed to get peak power of 60 mW cmâ2, while better results were obtained with mixed membranes, reticulated in phosphomolybdic acid and functionalized in phosphotungstic acid, allowing to measure a peak power of 350 mW cmâ2with a proton conductivity of â¼7 mS cmâ1.
Lingua originaleEnglish
pagine (da-a)6211-6219
Numero di pagine9
RivistaInternational Journal of Hydrogen Energy
Stato di pubblicazionePublished - 2017


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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