▎ 摘　　要

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 mu M), wide linear range (1.0-25.0 mM), and high sensitivity (26.33 mu A 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.