Nonenzymatic amperometric determination of hydrogen peroxide by graphene and gold nanorods nanocomposite modified electrode

•The graphene and gold nanorods nanocomposite was prepared.•A non-enzymatic hydrogen peroxide sensor is developed using nanocomposite modified glassy carbon electrode.•The sensor exhibits good performance in terms of the electrocatalytic reduction of H2O2.•The sensor shows distinguished stability, a...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2014-08, Vol.727, p.27-33
Main Authors: Pang, Pengfei, Yang, Zhongming, Xiao, Shixiu, Xie, Jinling, Zhang, Yanli, Gao, Yuntao
Format: Article
Language:English
Subjects:
Gold nanorods
Graphene
Hydrogen peroxide
Nonenzymatic
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Summary:•The graphene and gold nanorods nanocomposite was prepared.•A non-enzymatic hydrogen peroxide sensor is developed using nanocomposite modified glassy carbon electrode.•The sensor exhibits good performance in terms of the electrocatalytic reduction of H2O2.•The sensor shows distinguished stability, anti-interference ability, wide linear range, and low detection limit. Graphene-based electrochemical sensors have recently received much attention due to their outstanding sensing capability and economic viability. In this study, a novel non-enzymatic hydrogen peroxide (H2O2) sensor was developed using graphene and gold nanorods (GR-AuNRs) composite modified glassy carbon electrode (GCE). AuNRs were synthesized by seed-mediated growth method, and characterized by ultraviolet–visible spectroscopy (UV–vis) and transmission electron microscope (TEM). The GR-AuNRs composite material is endowed with a large electrochemical surface area and fast electron transfer properties in redox species. A GR-AuNRs composite modified electrode exhibits good performance in terms of the electrocatalytic reduction of H2O2; a sensor constructed from such an electrode shows a good linear dependence on H2O2 concentration in the range of 30μM to 5mM with a sensitivity of 389.2μAmM−1cm−2. The detection limit is estimated to be 10μM. Furthermore, the GR-AuNRs modified electrode exhibits freedom of interference from other co-existing electroactive species. This study provides a new kind of nanocomposite modified electrode for electrochemical sensors.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2014.05.028