Simultaneous detection of ascorbic acid and dopamine with electrochemically pretreated carbon nitride electrodes: Comparison with boron-doped diamond electrodes - Sorbonne Université Access content directly
Journal Articles Electrochemistry Communications Year : 2012

Simultaneous detection of ascorbic acid and dopamine with electrochemically pretreated carbon nitride electrodes: Comparison with boron-doped diamond electrodes

Abstract

Amorphous carbon nitride (a-CNx) electrodes were successfully tested as substitutes to boron-doped diamond (BDD) electrodes for the simultaneous voltammetric detection of dopamine (DA) and ascorbic acid (AA). For both materials, the same anodic pretreatment in alkaline medium was necessary to attain adequate and equivalent separation of the oxidation potential peaks. The electrochemical response of the a-CNx electrode in terms of peak current values and potentials was reproducible after each anodic pretreatment in alkaline medium. For BDD, DA oxidation was insensitive to anodic or cathodic pretreatments, whereas, for a-CNx, it was catalyzed by the anodic pretreatment. On the other hand, AA oxidation was catalyzed by the cathodic pretreatment for both electrodes.

Dates and versions

hal-00790579 , version 1 (20-02-2013)

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R.A. Medeiros, Abdelkader Benchikh, R.C. Rocha-Filho, O. Fatibello-Filho, Boualem Saidani, et al.. Simultaneous detection of ascorbic acid and dopamine with electrochemically pretreated carbon nitride electrodes: Comparison with boron-doped diamond electrodes. Electrochemistry Communications, 2012, 24, pp.61-64. ⟨10.1016/j.elecom.2012.08.011⟩. ⟨hal-00790579⟩
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