Graphene–Pt nanocomposite for nonenzymatic detection of hydrogen peroxide with enhanced sensitivity

A sensitive hydrogen peroxide (H 2O 2) sensor was fabricated based on graphene–Pt (GN–Pt) nanocomposite. The GN–Pt was synthesized by photochemical reduction of K 2PtCl 4 on GNs, and characterized by atomic force microscope (AFM), transmission electron microscope (TEM), and energy-dispersive X-ray s...

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Bibliographic Details
Published in:Electrochemistry communications 2011-10, Vol.13 (10), p.1131-1134
Main Authors: Xu, Fugang, Sun, Yujing, Zhang, Yue, Shi, Yan, Wen, Zhiwei, Li, Zhuang
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Electrochemical methods
Exact sciences and technology
Graphene
Hydrogen peroxide
Nanocomposite
Nonenzymatic sensor
Platinum nanoparticle
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Summary:A sensitive hydrogen peroxide (H 2O 2) sensor was fabricated based on graphene–Pt (GN–Pt) nanocomposite. The GN–Pt was synthesized by photochemical reduction of K 2PtCl 4 on GNs, and characterized by atomic force microscope (AFM), transmission electron microscope (TEM), and energy-dispersive X-ray spectroscopy (EDS). Electrochemical investigations indicated that the GN–Pt exhibited a high peak current and low overpotential towards the reduction of H 2O 2. The GN–Pt modified glass carbon electrode displayed a wide linear range (2–710 μM), low limit of detection (0.5 μM) and good selectivity for detection of H 2O 2 with a much higher sensitivity than that of Pt nanoparticles or graphene modified electrode. ► Graphene-Pt composite with high coverage of Pt nanoparticles is synthesized by a photochemical approach for the first time. ► Graphene-Pt exhibits larger peak current and lower overpotential for H 2O 2 reduction than Pt nanoparticles. ► Graphene-Pt displays much higher sensitivity and lower detection limit for H 2O 2 sensing than Pt nanoparticles or graphene.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2011.07.017