title: Self-assembled platinum nanoflowers on polydopamine-coated reduced graphene oxide for methanol oxidation and oxygen reduction reactions.
abstract: The morphology- and size-controlled synthesis of branched Pt nanostructures on graphene is highly favorable for enhancing the electrocatalytic activity and stability of Pt. Herein, a facile approach is developed for the efficient synthesis of well-dispersed Pt nanoflowers (PtNFs) on the surface of polydopamine (PDA)-modified reduced graphene oxide (PDRGO), denoted as PtNFs/PDRGO, in high yield. The synthesis was performed by a simple heating treatment of an aqueous solution that contained K2PtCl4 and PDA-modified graphene oxide (GO) without the need for any additional reducing agent, seed, surfactant, or organic solvent. The coated PDA serves not only as a reducing agent, but also as cross-linker to anchor and stabilize PtNFs on the PDRGO support. The as-prepared PtNFs/PDRGO hybrid, with spatially and locally separated PtNFs on PDRGO, exhibits superior electrocatalytic activity and stability toward both methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) in alkaline solutions.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022 (P. R. China); Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024 (P. R. China).
authors.forename: Xueqing
authors.initials: X
authors.lastname: Yu
authors.forename: Huan
authors.initials: H
authors.lastname: Wang
authors.forename: Liping
authors.initials: L
authors.lastname: Guo
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D055664:Electrochemical Techniques; D006108:Graphite / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D000432:Methanol / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*
chemical_list: D007211:Indoles; D010087:Oxides; D011108:Polymers; C568283:polydopamine; D010984:Platinum; D006108:Graphite; D010100:Oxygen; D000432:Methanol
keywords: electrochemistry; graphene; oxidation; platinum nanostructures; reduction