Electrogeneration of Superoxide Ion at Polyaniline-modified Electrodes in Aqueous Media

Hiroyuki ONO; Takeyoshi OKAJIMA; Futoshi MATSUMOTO; Tadato ORITANI; Akihito SHIMIZU; Mitsuo TAKAHASHI; Takeo OHSAKA

doi:10.5796/electrochemistry.69.953

Communications

Electrogeneration of Superoxide Ion at Polyaniline-modified Electrodes in Aqueous Media

Hiroyuki ONO, Takeyoshi OKAJIMA, Futoshi MATSUMOTO, Tadato ORITANI, Akihito SHIMIZU, Mitsuo TAKAHASHI, Takeo OHSAKA

Author information

Hiroyuki ONO
Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
Takeyoshi OKAJIMA
Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
Futoshi MATSUMOTO
Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
Tadato ORITANI
Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
Akihito SHIMIZU
Department of Chemical Science and Engineering, Tokyo National College of Technology
Mitsuo TAKAHASHI
Department of Chemical Science and Engineering, Tokyo National College of Technology
Takeo OHSAKA
Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

Keywords: O₂ Reduction, Superoxide Ion, Polyaniline, Superoxide Dismutase

JOURNAL FREE ACCESS

2001 Volume 69 Issue 12 Pages 953-955

DOI https://doi.org/10.5796/electrochemistry.69.953

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Abstract

Electrogeneration of superoxide ion (O₂⁻) with polyaniline (PAn)-modified indium-tin oxide (ITO) electrodes has been examined in alkaline aqueous media. The PAn-modified electrode showed electro catalytic activity for O₂reduction. Specific reactions of cytochrome c (cyt. c (Fe³⁺)), nitroblue tetrazolium salt analogue (WST-4) and superoxide dismutase (SOD) with O₂⁻ have been successfully applied to confirm the electrogeneration of O₂⁻. The results demonstrate that the PAn-modified electrode is useful for the electrogeneration of O₂⁻ via a redox-mediated reduction of O₂ in alkaline aqueous media.

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