title: NiO/graphene nanocomposite for determination of H2O2 with a low detection limit.
abstract: 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 μM, high sensitivity of 591 μA 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.
authors.affiliation: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: lihejun@nwpu.edu.cn.
authors.forename: Hejun
authors.initials: H
authors.lastname: Li
authors.affiliation: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Xinmeng
authors.initials: X
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Ningkun
authors.initials: N
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Xv
authors.initials: X
authors.lastname: Zhang
mesh_terms: D002384:Catalysis; D004563:Electrochemistry; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000032:analysis* / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D049329:Nanostructures / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D015203:Reproducibility of Results; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D006108:Graphite; D009532:Nickel; D006861:Hydrogen Peroxide; C028007:nickel monoxide
keywords: Electrochemical sensor; Graphene; H(2)O(2); NiO