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Reduction of dioxygen in neutral solution at polypyrrole electrode

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Abstract

Oxygen electroreduction has been investigated in 0.1 m Na2SO4 aqueous solution on an electrode covered by a polypyrrole (PPy) layer. The dependence of the reduction rate on the thickness of the PPy film has been established. The electrocatalytic properties of PPy in the studied electrode process have been confirmed. It was concluded that the nickel electrode covered with a PPy layer can be employed for water deoxygenation.

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Abbreviations

j :

current density (Am−2)

E :

electrode potential (V)

R b :

represents an electrolyte resistance

R 1, R 2 and R 1 * :

resistance related to the polymer resistance and the red-ox reaction resistance of PPy+/PPy0 (Ω cm2)

CPE1, CPE2 and CPE1 * :

constant phase elements

Q 1, Q 2, Q 1 * :

constants representative for CPE

n :

parameter between zero and unity, a measure of a rotation of the impedance spectrum in the complex plane given as 90° (1 − n)

a:

anodic

c:

cathodic

1,2:

indicates values for Pt/1 μm PPy electrode

1* :

indicates values for Pt/3 μm PPy electrode

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Authors and Affiliations

  1. Department of Chemical Technology, Technical University of Gdańsk, 80-952 Gdańsk, 11/12, Narutowicza, Poland

    S. Biallozor, T. Zalewska & A. Lisowska-Oleksiak

Authors
  1. S. Biallozor
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  2. T. Zalewska
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  3. A. Lisowska-Oleksiak
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Biallozor, S., Zalewska, T. & Lisowska-Oleksiak, A. Reduction of dioxygen in neutral solution at polypyrrole electrode. J Appl Electrochem 26, 1053–1057 (1996). https://doi.org/10.1007/BF00242200

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  • DOI: https://doi.org/10.1007/BF00242200

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