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Abstract. A facile two-step systematic plan of action was used to prepare nanocomposite of Reduced Graphene Oxide (RGO) doped poly(3,4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) decorated with nickel nanoparticles (Ni NPs) onto a Glassy Carbon Electrode (GCE). Composites of PEDOT:PSS and RGO were prepared by mixing each component solution and were fabricated as a bene cial substrate for Ni NPs. Ni NPs were electrodeposited on the PEDOT-RGO support by applying constant potential into nickel ions solutions. Then, Ni/PEDOT-RGO/GCE was employed as an e cient electrocatalyst for electrooxidation of urea. The electrocatalytic properties of Ni NPs/PEDOT-RGO modi ed glassy carbon electrode toward the oxidation of urea were analyzed by Cyclic Voltammetry (CV) and chronoamperometry (CA). Such studies evidenced the high electrocatalytic activity of Ni NPs and mixed PEDOT-RGO, which is mainly ascribed to the good electrochemical activity of PEDOT-RGO composites and the well-dispersed Ni NPs on the surface of PEDOT-RGO composite.

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