Facile Synthesis of Bimetallic Pt x Cu 1-x Nanostrands and Their Application in Non-Enzymatic Glucose Sensor

摘要

Bimetallic PtxCu1-x nanostrands were fabricated through a facile and effective wet chemical strategyand modified on glassy carbon electrode for sensitive non-enzymatic glucose sensors. Physicalproperties of the PtxCu1-x nanostrands were characterized by transmission electron microscopy (TEM),scanning electron microscopy (SEM) combined with energy dispersive X-ray spectroscopy (EDS), andX-ray diffraction (XRD) techniques. Electrochemical performances of the PtxCu1-x nanostrands wereevaluated by cyclic voltammetry, electrochemical impedance spectroscopy and chronoamperometryand compared to Pt nanostrands when modified onto glassy carbon electrodes. Electrochemicalmeasurements indicated that the oxidation current of glucose on the Pt70Cu30 nanostrands modifiedelectrode is linear to its concentration from 0.1 to 19 mM with a detection limit of 25 (S/N=3) and a good sensitivity of 23 M m . Besides, the Pt70Cu30 nanostrands modified electrode canavoide the interference of ascorbic acid (AA), uric acid (UA), acetamidophenol (AP) and fructose. Andit also demonstrated superior selectivity, outstanding stability, attractive reproducibility, and wellfeasibility for the analysis of real sample. Benefiting from its wonderful electrochemical performance,low spend as well as ease in fabrication, this novel Pt70Cu30 nanostrands material provides a potentialcandidate for preparing non-enzymatic glucose sensors with good properties.