期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 855, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2019.113610
关键词
Co-detection; Amperometric electrochemical sensors; Glucose electrooxidation; Uric acid electrooxidation; Dopamine electrooxidation
资金
- Greek State Scholarships Foundation
- Human Resource Development, Education and Lifelong Learning
- European Commission Social Fund-ECB
- Greek government
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 degrees 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.
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