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Journal Articles Langmuir Year : 2015

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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Dates and versions

hal-01225516 , version 1 (06-11-2015)

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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, 2015, 31 (36), pp.9737-9741. ⟨10.1021/acs.langmuir.5b02171⟩. ⟨hal-01225516⟩
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