Concise route to prepared graphene-CNTs nanocomposite supported Pt nanoparticles and used as new electrode material for electrochemical sensing

The sandwich lamination structure of graphene-multi-walled carbon nanotubes (Gr-CNTs) nanocomposite has been fabricated through in situ facile and green method. Then Pt nanoparticles are fabricated on Gr-CNTs via a simple one-step chemical reduction method in ethylene glycol (EG) and water system. The Gr-CNTs nanocomposite increased the solubility of carbon nanotubes in water, and CNTs could effectively prevent the irreversible aggregation of graphene. The Pt/Gr-CNTs were further characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), which indicated that the as-synthesized Pt nanoparticles were successfully dispersed on the surface of Gr-CNTs nanocomposite. Electrochemical study has proved that the Pt/Gr-CNTs nanocomposite has higher catalytic activity in neutral medium for methanol oxidation, which is hopefully used in various types of cells and biosensors in physiological medium.

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► Using an in situ method to synthesize the sandwich lamination structure of Gr-CNTs nanocomposite.
► Pt nanoparticles were fabricated on Gr-CNTs via a simple one-step chemical reduction method.
► The Pt/Gr-CNTs have high electro-catalytic activity for methanol oxidation in neutral medium.