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Updated: Jun 16, 2026

Electrochemical Preparation of Poly(3,4-Ethylenedioxythiophene) Layers on Gold Microelectrodes for Uric Acid-Sensing Applications
Published on: July 28, 2021
Conducting polymer-coated electrode as a reference/counter electrode in an organic phase and its application to a
Yumi Yoshida1, Satoshi Yamaguchi, Kohji Maeda
1Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo,Kyoto 606-8585, Japan. yyoshida@kit.jp
Abstract:
An indium tin oxide glass electrode coated with poly(3,4-ethylenedioxythiophene), PEDOT, PEDOT-ITOE, was proposed as an electrode workable as both a reference electrode and a counter one, a reference/counter electrode, in an organic phase and applied to a thin-layer cell of a two-electrode system for voltammetry at the liquid | liquid interface. By oxidizing the PEDOT film by 50% and doping a supporting electrolyte anion in an organic phase into the PEDOT film, a suitable depolarization was realized at the PEDOT | organic phase interface. The partially oxidized PEDOT-ITOE showed a Nerntian response to the supporting electrolyte anion concentration in the organic phase. The electrode potential was stable within +/-3 mV for 12 h, and showed a consistent value among the PEDOT-ITOEs prepared under the same procedure (the error range was about 7 mV, n = 8).
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