3D nanoporous gold scaffold supported on graphene paper: Freestanding and flexible electrode with high loading of ultrafine PtCo alloy nanoparticles for electrochemical glucose sensing
文献类型： 外文期刊
第一作者： Zhao, Anshun
作者： Zhao, Anshun;Zhang, Penghui;Xiao, Shuang;Wang, Lu;Dong, Yue;Yuan, Hao;Xiao, Fei;Zhang, Zhaowei;Li, Peiwu;Sun, Yimin;Jiang, Xueliang
作者机构：
关键词： PtCo alloy nanoparticles;Nanoporous gold;Graphene paper;Freestanding and flexible electrode;Nonenzymatic electrochemical glucose sensor
期刊名称：ANALYTICA CHIMICA ACTA （ 影响因子：6.558； 五年影响因子：6.228 ）
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年卷期：
页码：
收录情况： SCI
摘要： Recent advances in on-body wearable medical apparatus and implantable devices drive the development of light-weight and bendable electrochemical sensors, which require the design of high-performance flexible electrode system. In this work, we reported a new type of freestanding and flexible electrode based on graphene paper (GP) supported 3D monolithic nanoporous gold (NPG) scaffold (NPG/GP), which was further modified by a layer of highly dense, well dispersed and ultrafine binary PtCo alloy nanoparticles via a facile and effective ultrasonic electrodeposition method. Our results demonstrated that benefited from the synergistic effect of the electrocatalytically active PtCo alloy nanoparticles, the large-active-area and highly conductive 3D NPG scaffold, and the mechanically strong and stable GP electrode substrate, the resultant PtCo alloy nanoparticles modified NPG/GP (PtCo/NPG/GP) exhibited high mechanical strength and good electrochemical sensing performances toward nonenzymatic detection of glucose, including a wide linear range from 35 mu M- to 30 mM, a low detection limit of 5 mu M (S/N = 3) and a high sensitivity of 7.84 mu A cm(-2) mM(-1) as well as good selectivity, long-term stability and reproducibility. The practical application of the proposed PtCo/NPG/GP has also been demonstrated in in vitro detection of blood glucose in real clinic samples. (C) 2016 Elsevier B.V. All rights reserved.
分类号： O65
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