title: One-step synthesis of graphene/polyallylamine-Au nanocomposites and their electrocatalysis toward oxygen reduction.
abstract: A simple, inexpensive, one-step synthesis of graphene/PAA-Au nanocomposites was achieved by using polyallylamine (PAA) as a reducing and stabilizing agent. The synthetic process was carried out only in aqueous solution, which is versatile and environmentally friendly. The resulting nanocomposites could be dispersed into water stably without any additional protection by polymeric or surfactant stabilizers. The products were further characterized by UV-visible absorption spectroscopy, transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR) and photoelectron spectroscopy (XPS). The results indicate that graphene sheets played an important role as a support material to increase the active area of Au nanoparticles (AuNPs). And the resulting graphene/PAA-Au nanocomposites film exhibited good electrocatalytical activity towards reduction of both H(2)O(2) and O(2), which showed potential application in electrochemical sensors.
authors.affiliation: Engineering Laboratory for Modern Analytical Techniques, c/o State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
authors.forename: Qixian
authors.initials: Q
authors.lastname: Zhang
authors.forename: Qiaoqiao
authors.initials: Q
authors.lastname: Ren
authors.forename: Yuqing
authors.initials: Y
authors.lastname: Miao
authors.forename: Junhua
authors.initials: J
authors.lastname: Yuan
authors.forename: Kaikai
authors.initials: K
authors.lastname: Wang
authors.forename: Fenghua
authors.initials: F
authors.lastname: Li
authors.forename: Dongxue
authors.initials: D
authors.lastname: Han
authors.forename: Li
authors.initials: L
authors.lastname: Niu
mesh_terms: D002384:Catalysis; D004563:Electrochemistry; D006046:Gold / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D011073:Polyamines / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D011073:Polyamines; C063994:polyallylamine; D006046:Gold; D006108:Graphite; D006861:Hydrogen Peroxide; D010100:Oxygen