A preparation of homogeneous distribution of palladium nanoparticle on poly (acrylic acid)-functionalized graphene oxide modified electrode for formalin oxidation

[Display omitted] An excellent electrocatalytic activity, repeatability and stability of electrochemical sensor for formalin detection was fabricated based on a homogeneous distribution of ellipsoidal palladium nanoparticle (PdNPs) on poly (acrylic acid)-functionalized graphene oxide (PAA-GO) modifi...

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Bibliographic Details
Published in:Electrochimica acta 2017-09, Vol.247, p.229-240
Main Authors: Kongkaew, Supatinee, Kanatharana, Proespichaya, Thavarungkul, Panote, Limbut, Warakorn
Format: Article
Language:English
Subjects:
Acrylic acid
Electrical measurement
Electrocatalysis
electrocatalytic activity
Electrochemical analysis
Electrodes
Electroless deposition
Electroless plating
Electron microscopy
flow injection amperometry
Flow velocity
formalin oxidation
Fourier transforms
Glassy carbon
Graphene
graphene oxide
Nanoparticles
Oxidation
Palladium
palladium nanoparticle
poly(acrylic acid)
Reproducibility
Sensors
Stability
Studies
Transmission electron microscopy
Voltammetry
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Summary:[Display omitted] An excellent electrocatalytic activity, repeatability and stability of electrochemical sensor for formalin detection was fabricated based on a homogeneous distribution of ellipsoidal palladium nanoparticle (PdNPs) on poly (acrylic acid)-functionalized graphene oxide (PAA-GO) modified on a glassy carbon electrode (GCE) (PdNPs-PAA-GO/GCE) with incorporated flow injection amperometry (FI-Amp). Homogeneous distribution of ellipsoidal palladium nanoparticles (PdNPs) were dispersed on PAA-GO via an electroless deposition method. The surface morphology and electrochemical behavior of the PdNPs-PAA-GO/GCE were characterized by transmission electron microscopy, fourier transform infrared spectroscopy, cyclic voltammetry and amperometry. The PdNPs-PAA-GO/GCE exhibited excellent electrocatalytic activity toward formalin oxidation. Then this modified electrode was incorporated with FI-Amp for formalin sensor development. In order to obtain good analytical performances, many parameters such as the amount of PdNPs-PAA-GO, applied potential, flow rate and sample volume were optimized. Under optimal conditions, this sensor provided a wide linear range, 50-50,000μmolL−1, with high sensitivity (320μAmmolL−1cm−2). The limit of detection and limit of quantitation were 16μmolL−1 and 53μmolL−1, respectively. This proposed sensor exhibited good repeatability (RSD
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.06.131