A three dimensional Pt nanodendrite/graphene/MnO2 nanoflower modified electrode for the sensitive and selective detection of dopamine

Beibei Yang; Jin Wang; Duan Bin; Mingshan Zhu; Ping Yang; Yukou Du

doi:10.1039/C5TB01031D

A three dimensional Pt nanodendrite/graphene/MnO₂ nanoflower modified electrode for the sensitive and selective detection of dopamine†

Beibei Yang,^a Jin Wang,^a Duan Bin,^a Mingshan Zhu,*^b Ping Yang^a and Yukou Du*^a

* Corresponding authors

^a College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
E-mail: duyk@suda.edu.cn
Fax: +86 512 65880089
Tel: +86 512 65880361

^b Department Chemistry, University of Toronto, Toronto M5S 3H6, Canada
E-mail: mingshanzhu@yahoo.com

Abstract

An electrochemical sensor using a novel three dimensional (3D) ternary Pt nanodendrite/reduced graphene oxide/MnO₂ nanoflower (Pt/RGO/MnO₂) modified glassy carbon electrode was proposed for the selective and sensitive determination of dopamine (DA) in the presence of ascorbic acid (AA) and uric acid (UA). Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to evaluate electrochemical behaviors of DA on the as-prepared electrode. The oxidation peak current of DA is linearly proportional to its concentration in the range from 1.5–215.56 μM, with a detection limit of 0.1 μM (at S/N = 3). Compared to bare RGO, Pt nanodendrite/RGO and MnO₂ nanoflower modified electrodes, the 3D hierarchical ternary Pt/RGO/MnO₂ composites displayed the highest electrocatalytic activity for the selective detection of DA. Moreover, the 3D Pt/RGO/MnO₂ modified electrode can be reused with no obvious deterioration in the electrocatalytic performance. This work paves the way for developing a novel 3D nanostructure and offers new opportunities for improving the performance of electrochemical sensors with excellent sensitivity, repeatability and anti-interference.

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Article information

DOI: https://doi.org/10.1039/C5TB01031D
Article type: Paper
Submitted: 28 May 2015
Accepted: 20 Aug 2015
First published: 21 Aug 2015

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J. Mater. Chem. B, 2015,3, 7440-7448

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A three dimensional Pt nanodendrite/graphene/MnO₂ nanoflower modified electrode for the sensitive and selective detection of dopamine

B. Yang, J. Wang, D. Bin, M. Zhu, P. Yang and Y. Du, J. Mater. Chem. B, 2015, 3, 7440 DOI: 10.1039/C5TB01031D

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Journal of Materials Chemistry B