▎ 摘　　要

We describe a facile and effective polymer (polyacrylic acid, PAA)-assisted approach to synthesize a electrochemically active copper nanoparticle-graphene composite (CuNPs/PAA/GR) and also investigate its electrocatalytical activity towards oxidation of glucose in alkaline media. In the presence of PAA, the CuNPs/PAA/GR nanocomposite is prepared by in situ chemical reduction of the mixture of graphene oxide (GO) and Cu2+ ions using the sodium borohydride as a reductant. PAA acts as a bifunctional molecule for solubilizing GR into solution and chelating Cu2+ onto GR surfaces to facilitate the chemical deposition of CuNPs. The morphology of nanocomposite is characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Using the CuNPs/PAA/GR nanocomposite as a electrode modified material, excellent electrochemical performances are obtained, such as an enhanced electrocatalytic property, high sensitivity, excellent selectivity and satisfactory stability towards oxidation of glucose. This newly developed CuNPs/PAA/GR modified electrode is envisaged as a promising non-enzyme glucose sensor.