title: Synthesis of PtAu bimetallic nanoparticles on graphene-carbon nanotube hybrid nanomaterials for nonenzymatic hydrogen peroxide sensor.
abstract: PtAu bimetallic nanoparticles (NPs) were successfully synthesized on graphene sheets-multi walled carbon nanotubes (G-CNTs) hybrid nanomaterials via a simple one-step chemical co-reduction method in ethylene glycol (EG)-water system. The nanocomposites (PtAu/G-CNTs) were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Then a sensitive nonenzymatic hydrogen peroxide (H2O2) sensor was fabricated based on PtAu/G-CNTs nanocomposites modified glassy carbon electrode (GCE). The results of electrochemical experiments demonstrated that the sensor exhibited excellent electrocatalytic activity to the reduction of H2O2. The sensor displayed a fast amperometric response time of less than 4s with linear detection range from 2.0 to 8561 μM and a relatively low detection limit of 0.6 μM (S/N=3). In addition, the sensor also showed good selectivity for H2O2 detection, long-term stability and reproducibility.
authors.affiliation: College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.
authors.forename: Daban
authors.initials: D
authors.lastname: Lu
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Shaoxiong
authors.initials: S
authors.lastname: Lin
authors.forename: Letao
authors.initials: L
authors.lastname: Wang
authors.forename: Chunming
authors.initials: C
authors.lastname: Wang
mesh_terms: D055664:Electrochemical Techniques; D006046:Gold / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000032:analysis* / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry; D010984:Platinum / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D010984:Platinum; D006046:Gold; D006108:Graphite; D006861:Hydrogen Peroxide