▎ 摘　　要

Ag nanoparticles dispersed on Co3O4/3D porous reduced graphene oxide (Ag/Co3O4/rGO) were successfully synthesized through sol-gel method and used for fabricating a novel nonenzymatic hydrogen peroxide (H(2)O2) sensor. The structure and morphology of anocomposites were characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The electrochemical properties of the sensor were investigated by cyclic voltammetry and amperometry. The experimental results suggest that the composites have an excellent catalytic property toward dopamine with a wide linear range from 0.5 mu M-6.48mM, a low detection limit of 0.17 mu M (S/N=3) and high sensitivity of 413.72 mu AmM-1 cm(-2). In addition, the sensor exhibits long-term stability, good reproducibility and anti-interference.