Nonenzymatic electrochemical sensor based on Fe@Pt core-shell nanoparticles for hydrogen peroxide, glucose and formaldehyde
Nonenzymatic electrochemical sensor based on Fe@Pt core-shell nanoparticles for hydrogen peroxide, glucose and formaldehyde
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DOI：
10.1016/j.snb.2015.09.044
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发表时间：
2016-02-01
影响因子：
8.4
通讯作者：
Xia, Qinghua
中科院分区：
文献类型：
--
作者：
Mei, He;Wu, Wenqin;Xia, Qinghua
以 Vulcan XC-72 碳为载体，通过自发置换反应合成 Fe@Pt 核壳纳米颗粒。通过X射线衍射、透射电子显微镜和X射线光电子能谱对所得Fe@Pt/C纳米复合材料的物理性能进行了表征，并通过循环伏安法和计时电流法评价了Fe@Pt/C的电催化性能。与Pt/C相比，Fe@Pt/C对过氧化氢的还原以及葡萄糖和甲醛的氧化表现出更好的电催化活性。过氧化氢的电流传感在 2.5 μM 至 41.605 mM 范围内与其浓度呈线性关系，检测限为 750 nM (S/N = 3)，灵敏度为 218.97 μA mM(-1) cm (-2)。同时，基于Fe@Pt/C的传感器表现出1-16 mM葡萄糖和12.5 μM-15.4 mM甲醛的线性响应范围，分别具有11.75 μA mM(-1) cm(-2)和40.18 μA mM(-1) cm(-2)的高灵敏度。 (C) 2015 Elsevier B.V. 保留所有权利。
Fe@Pt core-shell nanoparticles were synthetized by spontaneous replacement reaction, using Vulcan XC-72 carbon as support. The physical properties of the obtained Fe@Pt/C nanocomposites were characterized by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy, and the electrocatalytic performances of the Fe@Pt/C were evaluated by cyclic voltammetry and chronoamperometry. Compared with the Pt/C, the Fe@Pt/C exhibited preferable electrocatalytic activity towards the reduction of hydrogen peroxide, and the oxidation of glucose and formaldehyde. Amperometric sensing of hydrogen peroxide was linear to its concentration in the range from 2.5 mu M to 41.605 mM, with a detection limit of 750 nM (S/N = 3) and a sensitivity of 218.97 mu A mM(-1) cm (-2). At the same time, the sensor based on Fe@Pt/C showed a linear response range of 1-16 mM glucose, and of 12.5 mu M-15.4 mM formaldehyde, with high sensitivities of 11.75 mu A mM(-1) cm(-2) and 40.18 mu A mM(-1) cm(-2), respectively. (C) 2015 Elsevier B.V. All rights reserved.