The reduction behavior of free chlorine at boron-doped diamond electrodes

The electrochemical reduction behavior of hypochlorite ions (ClO−) and hypochlorous acid (HClO) at the surface of boron-doped diamond electrodes is presented. The ClO− reduction behavior is strongly affected by the dissolved oxygen through homogeneous oxygen recovery reaction between ClO− and H2O2 a...

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Bibliographic Details
Published in:Electrochemistry communications 2016-09, Vol.70, p.18-22
Main Authors: Watanabe, Takeshi, Akai, Kazumi, Einaga, Yasuaki
Format: Article
Language:English
Subjects:
Boron-doped diamond
Electrochemical sensor
Free chlorine
Oxygen reduction reaction
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Summary:The electrochemical reduction behavior of hypochlorite ions (ClO−) and hypochlorous acid (HClO) at the surface of boron-doped diamond electrodes is presented. The ClO− reduction behavior is strongly affected by the dissolved oxygen through homogeneous oxygen recovery reaction between ClO− and H2O2 as ORR product. As for HClO reduction, one-electron mechanism which is a peculiar characteristic of boron-doped diamond electrodes, was observed. •Observation of the first reduction stage of HClO at a BDD electrode•The observation of a one-electron reduction is peculiar to BDD.•Characteristic as nonactive electrode allows to observe of one-electron reduction.•ClO− is considered as product of one-electron reduction of two HClO.•ClO− reduction proceeds through ORR by chemical reaction with H2O2.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2016.06.010