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The development of rapid,accurate,reliable hydrogen peroxide(H2O2)amperometric sensor has received continuous interest because H2O2 is not only a reactive oxygen species(ROS),but also a by-product of several oxidative metabolic path-ways.Meanwhile,in living organisms,H2O2 plays an important role as a signaling molecule in regulating diverse biological processes.In recent years,carbon-based nanomaterials such as grapheme and carbon nanotubes with special physical and chemical properties have been widely applied in chemosensors and biosensors.