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Volume 67, Issue 8

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Polyaniline doped with poly(acrylamidomethylpropanesulphonic acid): electrochemical behaviour and conductive properties in neutral solutions

Vladimir Lyutov / Svetlozar Ivanov
  • Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
  • Department of Electrochemistry and Electroplating II, Technical University Ilmenau, 98693, Ilmenau, Germany
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 / Vladimir Mirsky / Vessela Tsakova
Published Online: 2013-05-03 | DOI: https://doi.org/10.2478/s11696-013-0341-9

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Abstract

Poly(2-acrylamido-2-methyl-1-propanesulphonic acid) (PAMPSA)-doped polyaniline (PANI) layers are synthesised in the presence of sulphuric and perchloric acids. The effects of the inorganic acid as well as of the electrochemical synthetic procedure (potentiostatic and potentiodynamic deposition) and thickness of the polymer layers are studied. The focus is directed towards the pH dependence of the electrochemical redox activity and conductivity of the PAMPSA-doped PANI layers obtained under different conditions. Ascorbic acid oxidation is used as a test reaction to study the electrocatalytic behaviour of various PAMPSA-doped PANI layers in neutral solution. It is found that the type of inorganic component present in the polymerisation solution has a marked effect on the extent of doping in acidic solutions as well as on the redox electroactivity in neutral solutions. A comparison between potentiostatically and potentiodynamically synthesised layers at pH 7 shows a markedly lower conductance and lower extent of redox charge preservation in the case of potentiodynamic synthesis. The PANI electrocatalytic activity for ascorbic acid oxidation is also dependent on the polymer electrodeposition procedure, with potentiostatically synthesised layers exhibiting better electrocatalytic performance.

Keywords: polyaniline; polyacids; PAMPSA; conductance; electrochemical

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About the article

Published Online: 2013-05-03

Published in Print: 2013-08-01

Citation Information: Chemical Papers, Volume 67, Issue 8, Pages 1002–1011, ISSN (Online) 1336-9075, DOI: https://doi.org/10.2478/s11696-013-0341-9.

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