Abstract
Monodisperse stone-like PtNi alloy nanoparticles (NPs) were synthesized at room temperature using an inverse microemulsion method. The results of XRD, HRTEM, and EDS demonstrate that these NPs consist of a disordered alloy that has (a) a face-centered cubic structure, (b) Pt/Ni atomic ratios of ∼5:1, and (c) a large number of atoms exposed on the NP surface and enclosed by low index facets. The material was placed on a glassy electrode which then displayed superior response to glucose. Best operated at a potential of 0.43 V (vs. SCE), the electrode has the following features: (a) a wide linear range (from 0.5 mM to 40 mM), (b) rapid response (<1 s), (c) a low detection limit (0.35 μM) and (d) a sensitivity of 40.17 μA mM−1cm−2). The NP sensor also is fairly selective over ascorbic acid, uric acid and fructose. The sensor has repeatability and durability for up to 30 days after manufacture.
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Acknowledgements
The authors are grateful for the financial support provided by the National Natural Science Foundation of China No.31772019 and key project of the Natural Science Foundation of Tianjin No.10JCZDJC23600.
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Wang, R., Liang, X., Liu, H. et al. Non-enzymatic electrochemical glucose sensor based on monodispersed stone-like PtNi alloy nanoparticles. Microchim Acta 185, 339 (2018). https://doi.org/10.1007/s00604-018-2866-7
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DOI: https://doi.org/10.1007/s00604-018-2866-7