Glucose electrooxidation reaction in presence of dopamine and uric acid over ketjenblack carbon supported PdCo electrocatalyst

Herein, palladium-cobalt supported on ketjenblack (PCKB) electrocatalyst is synthesized and tested i) for the reaction of glucose electrooxidation (GOR) in presence of dopamine and uric acid and ii) for the simultaneous detection of the above three substances. The electrocatalyst, prepared using the...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2019-12, Vol.855, p.113610, Article 113610
Main Authors: Brouzgou, A., Lo Vecchio, C., Baglio, V., Aricò, A.S., Liang, Z.-X., Demin, A., Tsiakaras, P.
Format: Article
Language:English
Subjects:
Amperometric electrochemical sensors
Co-detection
Cobalt
Dopamine
Dopamine electrooxidation
Electrical measurement
Glucose
Glucose electrooxidation
Palladium
Photoelectrons
Potentiometric analysis
Uric acid
Uric acid electrooxidation
X ray photoelectron spectroscopy
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Summary:Herein, palladium-cobalt supported on ketjenblack (PCKB) electrocatalyst is synthesized and tested i) for the reaction of glucose electrooxidation (GOR) in presence of dopamine and uric acid and ii) for the simultaneous detection of the above three substances. The electrocatalyst, prepared using the sulphite complex method, is physicochemically characterized by X-Ray diffraction (XRD), transmission electron microscopy (TEM) and X-Ray photoelectron spectroscopy (XPS) and electrochemically characterized by cyclic voltammetry, potentiometry and chronoamperometry. It is found that the electrocatalytic activity towards GOR: i) is favoured in case of ketjenblack support, ii) is enhanced more when Co is added into Pd, iii) is enhanced with temperature increment from 26.0 to 42.0 °C, iv) is enhanced when glucose concentration increases up to 1.5 mM, while at higher concentration values is suppressed. The electrocatalyst ability of simultaneous glucose, dopamine and uric acid electrooxidation is attributed to the bi-functional role of the PCKB due to cobalt presence. •Glucose oxidation reaction (GOR) is more favoured using as support ketjenblack (KB) than vulcan-XC72.•Pd10Co1/KB favours GOR, even in presence of dopamine (DA) and uric acid (UA).•Dopamine (DA) and uric acid (UA) are also electrooxidated on Pd10Co1/KB.•Pd10Co1/KB is able to co-detect dopamine (DA), uric acid (UA) and glucose (Glu).
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2019.113610