Skip to Main content Skip to Navigation
Journal articles

Metal/polypyrrole quasi-reference electrode for voltammetry in nonaqueous and aqueous solutions.

Abstract : As an alternative to the usual commercial reference and quasi-reference electrodes (QREs), we propose metal (Pt, stainless steel) coated with partially oxidized polypyrrole as a QRE. The electrode is easily fabricated by cyclic voltammetry (CV) with the metal electrode in an acetonitrile or CH2Cl2 solution of 10 mM pyrrole containing 0.1 M Bu4NPF6. These QREs were more stable than the widely used metal (e.g., Ag, Pt) wire QRE as demonstrated by testing in several aqueous and organic media, with the stability checked by CV with ferrocenemethanol as the redox species. The results obtained demonstrate good stability of these QREs over a period of 1 day and relatively reproducible potential in a given solvent and supporting electrolyte. This electrode has the advantage that it does not contaminate the test solution with ions or solvent from a usual liquid electrolyte (e.g., the KCl in an Ag/AgCl). It is also simple to fabricate very small electrodes for use in nanocells, e.g., in scanning tunneling and electrochemical microscopy.
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-00256485
Contributor : Annie Delahaie <>
Submitted on : Friday, February 15, 2008 - 2:35:09 PM
Last modification on : Wednesday, April 7, 2021 - 3:18:03 PM

Links full text

Identifiers

Citation

Jalal Ghilane, Philippe Hapiot, A.J. Bard. Metal/polypyrrole quasi-reference electrode for voltammetry in nonaqueous and aqueous solutions.. Analytical Chemistry, American Chemical Society, 2006, 78 (19), pp.6868-72. ⟨10.1021/ac060818o⟩. ⟨hal-00256485⟩

Share

Metrics

Record views

471