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Proton Diffusion Coefficient in Electrospun Hybrid Membranes by Electrochemical Impedance Spectroscopy.

Abstract : Electrochemical Impedance Spectroscopy (EIS) was, for the first time, used to estimate the global transverse proton diffusion coefficient, D-H+(EHM), in electrospun hybrid conducting membranes (EHMs). In contrast to conventional impedance spectroscopy, EIS measurements were performed at room temperature with a liquid interface. In this configuration, the measure of the bulk proton transport is influenced by the kinetics of the transfer of proton at the solid/liquid interface. We demonstrated that the use of additives in the process of the membrane impacts the organization of the hydrophilic domains and also the proton transport. The D-H+(EHM) is close to 1.10(-7) cm(2) (+/- 0.1.10(-7) cm2 s(-1)) for the EHMs without additive, whereas it is 4.10(-6) cm2 (+/- 0.4.10(-6) cm(2) s(-1)) for EHMs with additives.
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https://hal.sorbonne-universite.fr/hal-01225516
Contributor : Véronique Martin <>
Submitted on : Friday, November 6, 2015 - 11:31:31 AM
Last modification on : Wednesday, September 23, 2020 - 4:34:33 AM

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Leslie Dos Santos, Christel Laberty-Robert, Manuel Maréchal, Hubert Perrot, Ozlem Sel. Proton Diffusion Coefficient in Electrospun Hybrid Membranes by Electrochemical Impedance Spectroscopy.. Langmuir, American Chemical Society, 2015, 31 (36), pp.9737-9741. ⟨10.1021/acs.langmuir.5b02171⟩. ⟨hal-01225516⟩

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