文献类型：期刊文献

英文题名：Enzyme-Free Amperometric Detection of Glucose on Platinum-Replaced Porous Copper Frameworks

作者：Hu, Yangliao[1];Niu, Xiangheng[1];Zhao, Hongli[2];Tang, Jie[1];Lan, Minbo[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Appl Chem, Shanghai 200237, Peoples R China

年份：2015

卷号：165

起止页码：383

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20151200658418);WOS:【SCI-EXPANDED(收录号:WOS:000353499400049)】；

基金：This research was financially supported by the National Natural Science Foundation of China (No. 21305044), the Fundamental Research Funds for the Central Universities (No. 222201314026), and the Science and Technology Commission of Shanghai Municipality (No. 13510710900).

语种：英文

外文关键词：Porous Cu foams; Galvanic replacement; Pt monolayer; Nonenzymatic detection; Glucose

摘要：With respect to a nonenzymatic electrochemical sensor for detection of small biomolecules like glucose, it is well recognized that an interface with highly electrocatalytic properties is desired. Our previous studies have demonstrated that porous Cu foams from hydrogen evolution assisted electrodeposition could provide beneficial structures for large active surface and mass transfer in glucose sensing (Biosens. Bioelectron., 2014, 51: 22-28), and decoration of micro-scale Pt cubes on this multiaperture substrate through manipulative deposition offered exciting activity and stability for electro-catalyzing glucose in neutral media (Chem. Eur. J., 2013, 19: 9534-9541). On the basis of these results here we further cover the porous Cu frameworks with a Pt monolayer through the galvanic replacement reaction, and fabricate a new electrochemical interface for high-performance determination of glucose. The sensing surface was facilely assembled by firstly electrodepositing porous Cu architectures with hydrogen evolution and then galvanically replacing the surface layer with Pt, and was well characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and energy dispersive spectroscopy. It was found that the unilaminar Pt-replaced Cu frameworks, with the profitable reaction surface derived from porous skeletons and the underlying activity of Pt-support composites, could supply the highly electrocatalytic oxidation of glucose in phosphate buffer solution (pH 7.4). As a result, the prepared enzymeless sensor provided linear amperometric responses for glucose in the concentration scope of 1 similar to 11 mM, with a high sensitivity of 9.62 mu A cm(-2)mM(-1). (C) 2015 Elsevier Ltd. All rights reserved.