Palladium nanoparticles decorated on activated fullerene modified screen printed carbon electrode for enhanced electrochemical sensing of dopamine

Journal of Colloid and Interface Science
Selvakumar PalanisamyFahad M A Al-Hemaid

Abstract

In the present work, an enhanced electrochemical sensor for dopamine (DA) was developed based on palladium nanoparticles decorated activated fullerene-C60 (AC60/PdNPs) composite modified screen printed carbon electrode (SPCE). The scanning electron microscopy and elemental analysis confirmed the formation of PdNPs on AC60. The fabricated AC60/PdNPs composite modified electrode exhibited an enhanced electrochemical response to DA with a lower oxidation potential than that of SPCE modified with PdNPs and C60, indicating the excellent electrooxidation behavior of the AC60/PdNPs composite modified electrode. The electrochemical studies confirmed that the electrooxidation of DA at the composite electrode is a diffusion controlled electrochemical process. The differential pulse voltammetry was employed for the determination of DA; under optimum conditions, the electrochemical oxidation signal of DA increased linearly at the AC60/PdNPs composite from 0.35 to 133.35 μM. The limit of detection was found as 0.056 μM with a sensitivity of 4.23 μA μM(-1) cm(-2). The good recovery of DA in the DA injection samples further revealed the good practicality of AC60/PdNPs modified electrode.

Citations

Dec 18, 2015·Journal of Colloid and Interface Science·Marek WojnickiMagdalena Luty-Błocho
Oct 22, 2016·Journal of Colloid and Interface Science·Chellakannu RajkumarHis-An Chen
Jan 13, 2017·The Journal of Physical Chemistry. B·Balakumar VellaichamyTharmaraj Paulmony
Jun 4, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Pikaned UppachaiSiriboon Mukdasai
Feb 7, 2020·Biosensors·Daniel Antuña-JiménezPablo Fanjul-Bolado
Dec 8, 2019·Sensors·Muqsit Pirzada, Zeynep Altintas

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