▎ 摘　　要

In the present work, a highly efficient catalyst toward the reduction of hydrogen peroxide (H2O2) was synthesized on account of reduced graphene oxide (rGO). The rGO were coated with ZnFe2O4 and Pd nanoparticles (Pd/ZnFe2O4/rGO), which were used to modify a glassy carbon electrode to detect H2O2. The Pd/ZnFe2O4/rGO nano composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, and X-ray photoelectron spectroscopy. Cyclic voltammetry and amperometry measurements were used to characterize and optimize the property of as-prepared H2O2 sensor. The proposed H2O2 sensor displayed a wide linear range from 25 mu M to 10.2 mM with an enhanced sensitivity of 621.64 mu A mM(-1) cm(-2).