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Journal of Analytical Methods in Chemistry
Volume 2014, Article ID 724538, 7 pages
Research Article

Quasireversible Process of Dopamine on Copper-Nickel Hydroxide Composite/Nitrogen Doped Graphene/Nafion Modified GCE and Its Electrochemical Application

1School of Chemical Engineering and Food Science, Hubei University of Arts and Science, Xiangyang 441053, China
2Key Laboratory of Low Dimensional Optoelectronic Materials and Devices of Hubei Province, Xiangyang 441053, China

Received 23 December 2013; Revised 2 April 2014; Accepted 4 April 2014; Published 16 June 2014

Academic Editor: Jun-Jie Zhu

Copyright © 2014 Chuan-yin Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Cu-Ni(OH)2/N-GR/Nafion/GCE has been prepared by electrodeposition and activation with NaOH. The proposed modified GCE was studied by electrochemical methods. It is found that dopamine shows favorable redox cyclic voltammetric response on the proposed modified GCE with peak separation of 25 mV and large current compared with on single-component modified GCE. The kinetic of electrode process has also been investigated with rate constant of 6.618 × 10−3 cm/s, which can be deduced to be a quasireversible or near-reversible process. The proposed method has been used for DA detection with linear range of 1.0 × 10−7 mol/L to 4.6 × 10−5 mol/L, and the detection limit is 3.3 × 10−8 mol/L. The proposed method has favorable stability and reproducibility and has also been used to determine DA in simulated samples and DA injections with favorable recoveries of 98.4% to 102.6%.