A highly sensitive non-enzymatic glucose sensor based on PtxCo1−x/C nanostructured composites

Platinum–cobalt (Pt x Co 1− x , x   =   0.70, 0.55) alloy nanoparticles have been successfully fabricated by the chemical reduction method, using carbon (Vulcan XC-72) as support. The physical properties of the materials were characterized by X-ray diffraction, and transmission electron microscopy , respectively. The electrochemical performance of the Pt x Co 1− x /C catalysts was evaluated by cyclic voltammetry , electrochemical impedance spectroscopy and chronoamperometry . Electrochemical measurements indicated that the oxidation current of glucose is linear to its concentration from 0.10 to 14.20   mM with high sensitivity of 73.60   μA   mM −1   cm −2 . In addition, the interference from the oxidation of fructose, uric acid , acetamidophenol and ascorbic acid could be effectively avoided. Meanwhile, the non-enzymatic glucose sensors exhibited excellent selectivity, stability and repeatability. Thus, this novel non-enzyme sensor has potential application in glucose detection.