Preparation and characterization of RuO 2/polyaniline composite electrodes

Suzana Sopčić, Marijana Kraljić Roković, Zoran Mandić, G. Inzelt

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

RuO 2-polyaniline (PANI) composites have been prepared by a novel method resulting in a composite material at the electrode surface. The method is based on the utilization of the chemical oxidation of aniline by the RuO 2 attached to the gold substrate in acid media. Electrochemical quartz crystal nanobalance combined with cyclic voltammetric and chronoamperometric measurements was used to study the oxidative deposition process as well as the exchange of ions and solvent molecules during cycling. The chemical reaction between RuO 2 and aniline results in a surface mass increase at the open circuit, and it also manifests itself in the substantial decrease of the open-circuit potential after addition of aniline into the supporting electrolyte. The potential range, the nature of the electrolyte, and the pH have been varied. The results of the piezoelectric nanogravimetric studies obtained for the redox transformation of RuO 2 and the composites are elucidated by the transport of ions and water molecules. It has been shown that the behavior of RuO 2 as well as of the composites strongly depends on the spontaneous and potential-dependent solvent sorption, the nature of the electrolyte, and the potential range. It has been found that the value of the specific capacitance was substantially increased by the polyaniline present without any significant deterioration of stability of the capacitor.

Original languageEnglish
Pages (from-to)2021-2026
Number of pages6
JournalJournal of Solid State Electrochemistry
Volume14
Issue number11
DOIs
Publication statusPublished - Nov 2010

Fingerprint

Polyaniline
Aniline
aniline
Electrolytes
preparation
Electrodes
composite materials
electrodes
Composite materials
electrolytes
Ions
Molecules
Quartz
Networks (circuits)
quartz crystals
deterioration
Gold
sorption
Deterioration
Sorption

Keywords

  • Composite
  • EQCN
  • Polyaniline
  • RuO
  • Supercapacitors

ASJC Scopus subject areas

  • Electrochemistry
  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Materials Science(all)

Cite this

Preparation and characterization of RuO 2/polyaniline composite electrodes. / Sopčić, Suzana; Roković, Marijana Kraljić; Mandić, Zoran; Inzelt, G.

In: Journal of Solid State Electrochemistry, Vol. 14, No. 11, 11.2010, p. 2021-2026.

Research output: Contribution to journalArticle

Sopčić, Suzana ; Roković, Marijana Kraljić ; Mandić, Zoran ; Inzelt, G. / Preparation and characterization of RuO 2/polyaniline composite electrodes. In: Journal of Solid State Electrochemistry. 2010 ; Vol. 14, No. 11. pp. 2021-2026.
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