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

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5 Citazioni (Scopus)

Abstract

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 H2–O2fuel cell. Chitosan/phosphomolybdic acid membranes allowed to get peak power of 60 mW cm−2, 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 cm−2with a proton conductivity of ∼7 mS cm−1.
Lingua originaleEnglish
pagine (da-a)6211-6219
Numero di pagine9
RivistaInternational Journal of Hydrogen Energy
Volume42
Stato di pubblicazionePublished - 2017

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Chitosan
Electrolytes
electrolytes
membranes
Membranes
acids
Acids
polymers
Polymers
cells
Ionotropic gelation
Polymeric membranes
polymeric films
Proton conductivity
protons
gelation
Polymer films
Fourier transform infrared spectroscopy
Protons
Alumina

All Science Journal Classification (ASJC) codes

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

Cita questo

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title = "Phosphomolybdic acid and mixed phosphotungstic/phosphomolybdic acid chitosan membranes as polymer electrolyte for H2/O2fuel cells",
abstract = "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 H2{\^a}€“O2fuel cell. Chitosan/phosphomolybdic acid membranes allowed to get peak power of 60{\^A} mW{\^A} cm{\^a}ˆ’2, 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{\^A} mW{\^A} cm{\^a}ˆ’2with a proton conductivity of {\^a}ˆ¼7{\^A} mS{\^A} cm{\^a}ˆ’1.",
keywords = "Chitosan; Composite polymeric membrane; H2{\^a}€“O2PEMFC; H3PMo12O40; H3PW12O40; Renewable Energy, Sustainability and the Environment; Fuel Technology; Condensed Matter Physics; Energy Engineering and Power Technology",
author = "{Di Quarto}, Francesco and Monica Santamaria and {Di Franco}, Francesco and Pecoraro, {Claudio Maria}",
year = "2017",
language = "English",
volume = "42",
pages = "6211--6219",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Phosphomolybdic acid and mixed phosphotungstic/phosphomolybdic acid chitosan membranes as polymer electrolyte for H2/O2fuel cells

AU - Di Quarto, Francesco

AU - Santamaria, Monica

AU - Di Franco, Francesco

AU - Pecoraro, Claudio Maria

PY - 2017

Y1 - 2017

N2 - 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 H2–O2fuel cell. Chitosan/phosphomolybdic acid membranes allowed to get peak power of 60 mW cm−2, 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 cm−2with a proton conductivity of ∼7 mS cm−1.

AB - 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 H2–O2fuel cell. Chitosan/phosphomolybdic acid membranes allowed to get peak power of 60 mW cm−2, 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 cm−2with a proton conductivity of ∼7 mS cm−1.

KW - Chitosan; Composite polymeric membrane; H2–O2PEMFC; H3PMo12O40; H3PW12O40; Renewable Energy, Sustainability and the Environment; Fuel Technology; Condensed Matter Physics; Energy Engineering and Power Technology

UR - http://hdl.handle.net/10447/252077

UR - http://www.journals.elsevier.com/international-journal-of-hydrogen-energy/

M3 - Article

VL - 42

SP - 6211

EP - 6219

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

ER -