Electric field enhanced water dissociation at the bipolar membrane junction from ac impedance spectra measurements

Preliminary experimental results of the ac impedance spectra of a bipolar ion-exchange membrane are reported and interpreted on the basis of a previous theoretical model based on the Nernst–Planck/Poisson equations. It is shown that the experiments can provide valuable electrochemical information ab...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 1998-01, Vol.442 (1), p.13-18
Main Authors: Holdik, H, Alcaraz, A, Ramı́rez, P, Mafé, S
Format: Article
Language:English
Subjects:
Ac impedance spectra
Bipolar membranes
Chemistry
Electric-field enhanced water dissociation
Exact sciences and technology
General and physical chemistry
Ion-exchange
Other ion exchangers: preparations and properties
Surface physical chemistry
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Summary:Preliminary experimental results of the ac impedance spectra of a bipolar ion-exchange membrane are reported and interpreted on the basis of a previous theoretical model based on the Nernst–Planck/Poisson equations. It is shown that the experiments can provide valuable electrochemical information about the bipolar junction structure and the electric-field enhanced water dissociation phenomenon that occurs at this junction, although the high number of unknown parameters involved makes it difficult to obtain accurate values for the parameters characteristic of this phenomenon.
ISSN:1572-6657
1873-2569
DOI:10.1016/S0022-0728(97)00506-8