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Synthesis and characterization of proton conducting inorganic-organic hybrid nanocomposite films from mixed phosphotungstic acid/phosphomolybdic acid/tetramethoxysilane/3-glycidoxypropyltrimethoxysilane/phosphoric acid for fuel cells
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10.1063/1.3278517
/content/aip/journal/jrse/1/6/10.1063/1.3278517
http://aip.metastore.ingenta.com/content/aip/journal/jrse/1/6/10.1063/1.3278517
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Synthetic procedure for obtaining the inorganic-organic hybrid nanocomposite membranes. (b) Photograph of the 3 PMA/6PWA doped hybrid membrane.

Image of FIG. 2.
FIG. 2.

Reaction scheme and structural model of the prepared nanocomposite hybrid films.

Image of FIG. 3.
FIG. 3.

XRD profiles of 20TMOS-50GPTMS--xPMA/yPWA composites.

Image of FIG. 4.
FIG. 4.

Elastic modulus of 20TMOS-50GPTMS--xPMA/yPWA composites measured at room temperature by three bending method.

Image of FIG. 5.
FIG. 5.

[(a) and (b)] FT-IR spectra of 20TMOS-50GPTMS--xPMA/yPWA composites.

Image of FIG. 6.
FIG. 6.

MAS NMR spectrum of the 3PMA/6PWA nanocomposite hybrid membrane.

Image of FIG. 7.
FIG. 7.

TGA-DTA curves of 20TMOS-50GPTMS--xPMA/yPWA composites heat treated at .

Image of FIG. 8.
FIG. 8.

SEM images of (a) 1PMA/2PWA , (b) 2PMA/4PWA , (c) 3PMA/6PWA , (d) 4PMA/8PWA , and (e) 5PMA/10PWA composites and (f) TEM image of 3PMA/6PWA doped hybrid membrane. (g)–(k) show the EDX spectra of all the prepared hybrid membranes.

Image of FIG. 9.
FIG. 9.

Temperature dependence of conductivity of 20TMOS-50GPTMS--xPMA/yPWA hybrid membranes. Conductivity was obtained under 50% RH. The inset shows the proton conductivity of host membrane without HPA addition and Nafion® 117 under 50% RH.

Image of FIG. 10.
FIG. 10.

(a) Cole–Cole representations of impedance data measured for 20TMOS-50GPTMS--3PMA/6PWA composite at 50% RH. (b) Typical impedance plot measured for 3PMA/6PWA doped membrane at and 90% RH. The inset shows the proton conductivities of the 3PMA/6PWA doped composite at different RHs from 50% to 90% RH at .

Image of FIG. 11.
FIG. 11.

Hydrogen permeation rate as a function of inverse temperature for the 3PMA/6PWA nanocomposite hybrid membrane including Nafion 117 (inset picture). The permeability measurements were performed under hydrogen feed in the temperature range of .

Image of FIG. 12.
FIG. 12.

Polarization curve displaying the current density and power density for the 3PMA/6PWA doped hybrid membrane at and 50% RH.

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/content/aip/journal/jrse/1/6/10.1063/1.3278517
2009-12-31
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Synthesis and characterization of proton conducting inorganic-organic hybrid nanocomposite films from mixed phosphotungstic acid/phosphomolybdic acid/tetramethoxysilane/3-glycidoxypropyltrimethoxysilane/phosphoric acid for H2/O2 fuel cells
http://aip.metastore.ingenta.com/content/aip/journal/jrse/1/6/10.1063/1.3278517
10.1063/1.3278517
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