TY - JOUR
T1 - Phosphomolybdic acid and mixed phosphotungstic/phosphomolybdic acid chitosan membranes as polymer electrolyte for H2/O2fuel cells
AU - Di Franco, Francesco
AU - Di Quarto, Francesco
AU - Santamaria, Monica
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 H2âO2fuel cell. Chitosan/phosphomolybdic acid membranes allowed to get peak power of 60Â mWÂ 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 350Â mWÂ cmâ2with a proton conductivity of â¼7Â mSÂ cmâ1.
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 H2âO2fuel cell. Chitosan/phosphomolybdic acid membranes allowed to get peak power of 60Â mWÂ 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 350Â mWÂ cmâ2with a proton conductivity of â¼7Â mSÂ cmâ1.
KW - Chitosan; Composite polymeric membrane; H2âO2PEMFC; H3PMo12O40; H3PW12O40; Renewable Energy
KW - Sustainability and the Environment; Fuel Technology; Condensed Matter Physics; Energy Engineering and Power Technology
KW - Chitosan; Composite polymeric membrane; H2âO2PEMFC; H3PMo12O40; H3PW12O40; Renewable Energy
KW - 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 -