Non-enzymatic electrochemical glucose sensor based on monodispersed stone-like PtNi alloy nanoparticles

作者：Wang, Rulei; Liang, Xinyi^*; Liu, Haiyan; Cui, Land; Zhang, Xiaoyue; Liu, Changjiang

来源：Microchimica Acta, 2018, 185(7): 339.

DOI：10.1007/s00604-018-2866-7

• Enzyme-free sensing
• Bimetal
• Nanocrystals
• Texture
• Morphology
• Catalysis
• Low index facet

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 similar to 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 mu M) and (d) a sensitivity of 40.17 mu A mM(-1)cm(-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.

• 出版日期2018-7
• 单位天津大学; 天津商业大学