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Influence of the doped counteranions on the penetration of H + cations through poly( N ‐methylpyrrole)
Author(s) -
Ouyang Jianyong,
Li Yongfang
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960321)59:12<1827::aid-app3>3.0.co;2-s
Subject(s) - chronoamperometry , chemistry , aqueous solution , doping , penetration (warfare) , electrode , polymerization , diffusion , polymer , polymer chemistry , analytical chemistry (journal) , electrochemistry , materials science , cyclic voltammetry , organic chemistry , thermodynamics , physics , optoelectronics , operations research , engineering
The reduction of H + cations on the Pt electrode coated with poly( N ‐methylpyrrole) (PNMP) film was studied in an acidic aqueous solution. The reduction depends strongly on the counteranions originally doped in PNMP during polymerization. H + cations can penetrate the neutral or overoxidized film from PNMP(TsO − ), in which the H + diffusion coefficient is estimated as 10 −5 cm 2 s −1 by the potential step chronoamperometry method. But the neutral or overoxidized film from PNMP(NO 3 − ) is closed for H + penetration. © 1996 John Wiley & Sons, Inc.