title: Development of ternary and quaternary catalysts for the electrooxidation of glycerol.
abstract: This work consisted in the preparation of platinum-based catalysts supported on carbon (Vulcan XC-72) and investigation of their physicochemical and electrochemical properties. Catalysts of the C/Pt-Ni-Sn-Me (Me = Ru or Ir) type were prepared by the Pechini method at temperature of 350°C. Four different compositions were homemade: C/Pt(60)Sn(10)Ni(30), C/Pt(60)Sn(10)Ni(20)Ru(10), C/Pt(60)Sn(10)Ni(10)Ru(20), and C/Pt(60)Sn(10)Ni(10)Ir(20). These catalysts were electrochemically and physically characterized by cyclic voltammetry (CV), chronoamperometry (CA) in the presence of glycerol 1.0 mol dm(-3), X-ray diffraction (XRD), and high-resolution transmission electron microscopy (HRTEM). XRD results showed the main peaks of face-centered cubic Pt. The particle sizes obtained from XRD and HRTEM experiments were close to values ranging from 3 to 8.5 nm. The CV results indicate behavior typical of Pt-based catalysts in acid medium. The CV and CA data reveal that quaternary catalysts present the highest current density for the electrooxidation of glycerol.
authors.affiliation: Department of Chemistry, Federal University of Espírito Santo, Vitória, ES, Brazil.
authors.forename: L M
authors.initials: LM
authors.lastname: Artem
authors.forename: D M
authors.initials: DM
authors.lastname: Santos
authors.forename: A R
authors.initials: AR
authors.lastname: De Andrade
authors.forename: K B
authors.initials: KB
authors.lastname: Kokoh
authors.forename: J
authors.initials: J
authors.lastname: Ribeiro
mesh_terms: D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D004563:Electrochemistry / Q000379:methods*; D005990:Glycerol / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods; D010084:Oxidation-Reduction; D010316:Particle Size; D010984:Platinum / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D010984:Platinum; D002244:Carbon; D005990:Glycerol