NDLI: Electrodeposition of self-doped copolymers of aniline with aminobenzensulfonic acids on stainless steel. Morphological and electrochemical characterization

Content Provider	Springer Nature Link
Author	Michael, Kyriaki Prochaska, Charikleia Sazou, Dimitra
Copyright Year	2015
Abstract	Self-doped conducting polyaniline (PAn) films were deposited on passive stainless steel (SS) AISI304 substrates by cyclic potential sweep deposition from aqueous mixed monomer solutions of aniline (An) and different aminobenzenesulfonic acids (2-, 3- or, 4-aminobenzenesulfonic acid, ABSA), without the presence of a supporting electrolyte. Two different An concentrations were examined (0.01 and 0.05 M), while the concentration of each ABSA used was kept constant at 0.1 M. The surface morphology and roughness of the produced stable conducting copolymer thin films was studied by atomic force microscopy (AFM) and their electrochemical behavior by cyclic voltammetry. The decrease of An concentration enhanced the electropolymerization in the case of 2- and 3-ABSA, namely, orthanilic (OA) and metanilic (MA) acids, respectively, while a deceleration was observed for 4-ABSA (sulfanilic acid, SA). The shapes and sizes of the obtained morphological features depended on the ABSA reactivity and An concentration. AFM data indicated the formation of globular micro/nanostructures for all the examined copolymers, P(An-co-ABSA). Tubular micro/nanostructures, which were more desirable due to their promising practical applications, were apparent only in case of OA and SA and in larger numbers at the lower An concentration of 0.01 M. As ABSA had the function of the comonomer, surfactant, and internal dopant, it is suggested that the tubular micro/nanostructures were rather related to an interfacial self-assembly of sulfonated PAn oligomers at the early stage of the copolymerization process. Cyclic voltammetry indicated that redox processes of the SS\|P(An-co-ABSA) electrodes in acid solutions are characteristic of a partially sulfonated PAn. The electrochemical activity of the SS\|P(An-co-ABSA) electrodes is also kept in neutral media. Open circuit potential measurements and electrochemical impedance spectroscopy show that the SS\|P(An-co-ABSA) electrodes are stable in acid media. Electronic and steric effects control the fraction of ABSA and its distribution in the copolymer chain resulting in differences in the redox potential and charge storage in the three copolymers.
Starting Page	2917
Ending Page	2931
Page Count	15
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	19
Issue Number	10
e-ISSN	14330768
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-05-30
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aniline Aminobenzenesulfonic acids Electrochemical copolymerization on stainless steel AISI304 Cyclic voltammetry Atomic force microscopy Physical Chemistry Electrochemistry Energy Storage Characterization and Evaluation of Materials Analytical Chemistry Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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