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

被引：36
|
作者：
Medeiros, R. A. [2 ]
Benchick, A. [1 ,3 ]
Rocha-Filho, R. C. [2 ]
Fatibello-Filho, O. [2 ]
Saidani, B. [3 ]
Debiemme-Chouvy, C. [1 ]
Deslouis, C. [1 ]
机构：
[1] Univ Paris 06, LISE UPR 15, CNRS, F-75005 Paris, France
[2] Univ Fed Sao Carlos, Dept Quim, BR-13560970 Sao Carlos, SP, Brazil
[3] Univ Abderrahmane MIRA Bejaia, LTMGP, Fac Technol, Dept Genie Proc, Bejaia, Algeria
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2012年 / 24卷
基金：
巴西圣保罗研究基金会;
关键词：
Electroanalysis; Square-wave voltammetry; Anodic pretreatment; Cathodic pretreatment; BDD; a-CNx; AMORPHOUS-CARBON; VOLTAMMETRIC DETERMINATION; FILM ELECTRODES; THIN-FILMS; POLYCRYSTALLINE; SELECTIVITY; REACTIVITY; IMPEDANCE; OXIDATION;
D O I：
10.1016/j.elecom.2012.08.011
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
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. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：61 / 64
页数：4
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