A nickel foam modified with electrodeposited cobalt and phosphor for amperometric determination of dopamine
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Considering the importance of dopamine (DA) detection for neuroscience and disease diagnosis, herein, an electrochemical sensor for dopamine is described. It is based on the use of a Ni-Co-P nanostructure fabricated on nickel foam via electrode position from cobalt chloride and ammonium phosphate for 10 min. Time-dependent experiments show the transformation of Ni-Co-P nanoparticles to spheres. The resulting electrode display excellent electrochemical response to DA. Figures of merit include (a) a working potential of 0.55 V (vs. Ag/AgCl); (b) an electrochemical sensitivity of 5262 μA mM−1 cm−2; (c) a wide linear range (from 0.5 to 2350 μM), and (d) a 1 μM detection limit. The outstanding electrochemical performance is explained by the synergistic effects of large surface area, improved electron transfer, presence of free binders, and the presence of three active components (nickel, cobalt and phosphonium ion).
KeywordsElectrodeposition Ni-co-P Nanostructure Nickel foam Evolution Electrochemical assay Sensor Dopamine Sensitivity Synergistic effects
All authors thank the financial support from the Natural Science Foundation of China (Grant number 11564042) and the project of the Department of Science and Technology of Yunnan Province (2018FB091).
Compliance with ethical standards
The author(s) declare that they have no competing interests.
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