Fabrication of Flower-shaped Pt-Au-graphene Nanostructure and its Application in Electrochemical Detection of Glucose

Abstract The flower-shaped Pt-Au-graphene nanostructures were synthesized by one-step electrochemical reduction method. The electrocatalytic activities of the nanostructures toward glucose oxidation were investigated by cyclic voltammetry. The results indicated that the nanocomposites exhibited a higher electrocatalytic activity than Pt-Au nanoparticles. A glucose nonenzymatic sensor could be easily developed with the use of the flower-shaped Pt-Au-graphene nanostructure. The sensor exhibited low detection limit (4.0 μM), wide linear range (1.0−25.0 mM), and high sensitivity (26.33 μA cm −2 mM −1 ). In addition, the sensor exhibited excellent reproducibility, stability and selectivity for the determination of glucose, and could be used to analyze real samples.