▎ 摘　　要

In this study, we have reported the preparation of NiO/graphene (NiO/GR) nanocomposite for determination of H2O2 via a convenient solid reaction. The electrocatalytic behaviors towards H2O2 are investigated by cyclic voltammetry and chronoamperometry in alkaline aqueous solution. Electrochemical results indicate that the NiO/GR nanocomposite exhibits a high peak current towards the oxidation of H2O2. Moreover, high electrocatalytic activity toward the oxidation of H2O2 is observed with a low detection limit of 0.7664 mu M, high sensitivity of 591 mu A mM(-1) cm(-2), a wide linear range of 0.25-4.75 mM (R-2=0.9971). Besides, the sensor presents many attractive features such as high stability and reproducibility. (C) 2015 Elsevier B.V. All rights reserved.