Hydroxide Ion Oxidation in Aqueous Solutions Using Boron-Doped Diamond Electrodes

Irkham, Takeshi Watanabe, Yasuaki Einaga

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The electrochemical oxidation behavior of hydroxide ions at the surface of boron-doped diamond (BDD) electrodes is presented. The hydroxide ion oxidation behavior was found to be affected by the surface conditions of the BDD electrode. Over the NaOH concentration range of 0.5-10 mM, a well-defined voltammetric wave attributed to hydroxide ion oxidation was observed at ∼1.25 V versus a Ag/AgCl reference electrode when using an anodically oxidized BDD (AO-BDD) electrode, while it was observed at around ∼1.15 V when a cathodically reduced BDD (CR-BDD) electrode was used. Although the hydroxide ion oxidation profiles were slightly different for the AO-BDD and CR-BDD electrodes, the peak currents was each found to have linear relationships with the NaOH concentration over the same range.

Original languageEnglish
Pages (from-to)7139-7144
Number of pages6
JournalAnalytical Chemistry
Volume89
Issue number13
DOIs
Publication statusPublished - 2017 Jul 5

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Diamond
Boron
Oxidation
Electrodes
Electrochemical oxidation
hydroxide ion

ASJC Scopus subject areas

  • Analytical Chemistry

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Hydroxide Ion Oxidation in Aqueous Solutions Using Boron-Doped Diamond Electrodes. / Irkham; Watanabe, Takeshi; Einaga, Yasuaki.

In: Analytical Chemistry, Vol. 89, No. 13, 05.07.2017, p. 7139-7144.

Research output: Contribution to journalArticle

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AB - The electrochemical oxidation behavior of hydroxide ions at the surface of boron-doped diamond (BDD) electrodes is presented. The hydroxide ion oxidation behavior was found to be affected by the surface conditions of the BDD electrode. Over the NaOH concentration range of 0.5-10 mM, a well-defined voltammetric wave attributed to hydroxide ion oxidation was observed at ∼1.25 V versus a Ag/AgCl reference electrode when using an anodically oxidized BDD (AO-BDD) electrode, while it was observed at around ∼1.15 V when a cathodically reduced BDD (CR-BDD) electrode was used. Although the hydroxide ion oxidation profiles were slightly different for the AO-BDD and CR-BDD electrodes, the peak currents was each found to have linear relationships with the NaOH concentration over the same range.

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