Electrocatalysis in the oxidation of acetaminophen with an electrochemically activated glassy carbon electrode

被引：27

作者：

Chiavazza, Enrico ^{[1
]}

Berto, Silvia ^{[1
]}

Giacomino, Agnese ^{[2
]}

Malandrino, Mery ^{[1
]}

Barolo, Claudia ^{[1
,3
]}

Prenesti, Enrico ^{[1
]}

Vione, Davide ^{[1
]}

Abollino, Ornella ^{[1
]}

机构：

[1] Univ Turin, Dept Chem, Via P Giuria 7, I-10125 Turin, Italy

[2] Univ Turin, Dept Drug Sci & Technol, Via Giuria 9, I-10125 Turin, Italy

[3] Univ Turin, INSTM & NIS Ctr, Via Quarello 15A, I-10135 Turin, Italy

来源：

ELECTROCHIMICA ACTA | 2016年 / 192卷

关键词：

Acetominophen oxidation; Glassy carbon electrode; Anodization; Electrochemical activation; VOLTAMMETRIC DETERMINATION; AQUATIC ENVIRONMENT; PARACETAMOL; REDUCTION; FATE;

D O I：

10.1016/j.electacta.2016.01.187

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A simple approach such as the anodic activation of a glassy carbon electrode (GCE) can be used successfully to improve the detection of acetaminophen at very low concentration levels. In this work, we observed that the exposure of a GCE to a high potential (2 V vs Ag/AgCl) for a limited time period (60 s) in the presence of 50 mM borate/phosphate buffer (pH 9) provides a strongly electro-activated surface. The activated surface was characterized by means of several techniques (electrochemistry, EIS, SEM, AFM, mu-Raman, XPS). It appeared that the anodization procedure gave rise to a strong oxygen-based functionalization that did not affect morphologically the electrode surface. The mechanism of interaction of the activated electrode with the analyte was studied by electrochemical methods, then the electrode was applied to the electroanalysis of acetaminophen by differential pulse voltammetry. In this application, the method showed promising analytical performance, detecting nanomolar traces of acetaminophen. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：139 / 147

页数：9

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