Nonenzymatic electrochemical sensor based on Fe@Pt core-shell nanoparticles for hydrogen peroxide, glucose and formaldehyde

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• 作者：He MeiAuthor Vitae ; Wenqin WuAuthor Vitae ; Beibei YuAuthor Vitae ; Huimin Wu ; ^{whm267@126.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Shengfu WangAuthor Vitae ; Qinghua XiaAuthor Vitae
• 关键词：Fe@Pt core&ndash ; shell nanoparticles ; Nonenzymatic sensor ; Hydrogen peroxide ; Glucose ; Formaldehyde
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：223
• 期：Complete
• 页码：68-75
• 全文大小：1860 K

文摘

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 μM to 41.605 mM, with a detection limit of 750 nM (S/N = 3) and a sensitivity of 218.97 μA 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 μM–15.4 mM formaldehyde, with high sensitivities of 11.75 μA mM⁻¹ cm⁻² and 40.18 μA mM⁻¹ cm⁻², respectively.