title: Dimethylformamide-mediated synthesis of water-soluble platinum nanodendrites for ethanol oxidation electrocatalysis.
abstract: Herein we describe the synthesis of water-soluble platinum nanodendrites in dimethylformamide (DMF), in the presence of polyethyleneimine (PEI) as a stabilizing agent. The average size of the dendrites is in the range of 20-25 nm while their porosity can be tuned by modifying the concentration of the metal precursor. Electron tomography revealed different crystalline orientations of nanocrystallites in the nanodendrites and allowed a better understanding of their peculiar branching and porosity. The high surface area of the dendrites (up to 22 m(2) g(-1)) was confirmed by BET measurements, while X-ray diffraction confirmed the abundance of high-index facets in the face-centered-cubic crystal structure of Pt. The prepared nanodendrites exhibit excellent performance in the electrocatalytic oxidation of ethanol in alkaline solution. Sensing, selectivity, cycleability and great tolerance toward poisoning were demonstrated by cyclic voltammetry measurements.
authors.affiliation: Departamento de Quimica Fisica, Universidade de Vigo, 36310 Vigo, Spain. mourdik@uvigo.es
authors.forename: Stefanos
authors.initials: S
authors.lastname: Mourdikoudis
authors.forename: Mariana
authors.initials: M
authors.lastname: Chirea
authors.forename: Thomas
authors.initials: T
authors.lastname: Altantzis
authors.forename: Isabel
authors.initials: I
authors.lastname: Pastoriza-Santos
authors.forename: Jorge
authors.initials: J
authors.lastname: Pérez-Juste
authors.forename: Fernando
authors.initials: F
authors.lastname: Silva
authors.forename: Sara
authors.initials: S
authors.lastname: Bals
authors.forename: Luis M
authors.initials: LM
authors.lastname: Liz-Marzán
mesh_terms: D002384:Catalysis; D003712:Dendrites / Q000737:chemistry; D004126:Dimethylformamide / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D011094:Polyethyleneimine / Q000737:chemistry; D016062:Porosity; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D000431:Ethanol; D010984:Platinum; D004126:Dimethylformamide; D011094:Polyethyleneimine