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Abstract
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Hydrazine is a reducing agent which has a wide range of applications in many industrial processes. It has also been shown that hydrazine has neurotoxic, carcinogenic,and mutagenic effects. Electrochemical techniques offer the opportunity for portable, cheap, and rapid methodologies for detection of hydrazine. However, electrochemical oxidation of hydrazine is kinetically sluggish and a relatively high overpotential is required for its oxidation at the bare electrode. Therefore, searching for new methodologies to modify the electrode surface in order to reduce the overpotential of the hydrazine oxidation is required[1]. Due to exceptional electronic propertiesof graphene (G) and nitrogen doped graphene (N-Gr), they are considered as superior supporting platforms for novel metal nanoparticle decorations. Here, we report, a novel one-step electrochemicalmethod for synthesis ofnitrogen-doped graphene sheets uniformly decorated with platinum nanoparticles (Pt/N-Gr).For the first timePt/N-Gr was used for electrode modificationand successfully applied for electrooxidation of hydrazine at a reduced potential.The glassy carbon electrode modified with Pt/N-Gr shows excellent electrocatalytic activity toward hydrazine oxidationat reduced overvoltage (-0.4 V versus Ag/AgCl reference electrode in phosphate buffer solution with pH 9). Cyclic voltammetry and hydrodynamic amperometry were used as measuring techniques for hydrazine detection. The detection limit was 50 nM and concentration range was more than 50 M.
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