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Issue 29, 2020, Issue in Progress
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A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

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Abstract

A platinum–silver graphene (Pt–Ag/Gr) nanocomposite modified electrode was fabricated for the electrochemical detection of dopamine (DA). Electrochemical studies of the Pt–Ag/Gr nanocomposite towards DA detection were performed by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The CV analysis showed that Pt–Ag/Gr/GCE had enhanced electrocatalytic activity towards DA oxidation due to the synergistic effects between the platinum–silver nanoparticles and graphene. The DPV results showed that the modified sensor demonstrated a linear concentration range between 0.1 and 60 μM with a limit of detection of 0.012 μM. The Pt–Ag/Gr/GCE presented satisfactory results for reproducibility, stability and selectivity. The prepared sensor also showed acceptable recoveries for a real sample study.

Graphical abstract: A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

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Supplementary files

Article information


Submitted
31 Dec 2019
Accepted
19 Apr 2020
First published
05 May 2020

This article is Open Access

RSC Adv., 2020,10, 17336-17344
Article type
Paper

A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

N. S. Anuar, W. J. Basirun, Md. Shalauddin and S. Akhter, RSC Adv., 2020, 10, 17336
DOI: 10.1039/C9RA11056A

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