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Charge transfer across a conducting polypyrrole membrane separated by two electrolyte solutions
Author(s) -
Wang Erkang,
Liu Yuqing,
Samec Z.,
Dvořák C.
Publication year - 1990
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140020809
Subject(s) - polypyrrole , electrolyte , cyclic voltammetry , membrane , chemistry , chloride , ion , electrode , inorganic chemistry , supporting electrolyte , voltammetry , analytical chemistry (journal) , electrochemistry , chromatography , organic chemistry , biochemistry
This article describes anion transfer across a conducting polypyrrole membrane (PPM) using cyclic voltammetry with a four‐electrode system. The transfer process of both chloride and nitrate anions across the polypyrrole membrane used to separate two pools of electrolyte solutions has been studied. A wide potential window beyond 3 V was obtained, and well‐developed voltammograms for the transfer of nitrate and chloride anions appeared within this window. The transfer process depends on the ion size, the ion charge, and the surface characteristics of the polypyrrole membrane. The one‐way transfer phenomenon observed in different potential‐bias directions can be explained by the asymmetrical ion channel model of the polypyrrole membrane.