title: Platinum Electrodeposition on Unsupported Single Wall Carbon Nanotubes and Its Application as Methane Sensing Material.
abstract: This paper reports the decoration of single wall carbon nanotubes (SWCNTs) with platinum (Pt) nanoparticles using an electrochemical technique, rotating disk slurry electrode (RoDSE). Pt/SWCNTs were electrochemically characterized by cyclic voltammetry technique (CV) and physically characterized through the use of transmission electron microscopy (TEM), energy dispersive spectroscopy - X-ray florescence (EDS-XRF) and X-ray diffraction (XRD). After characterization it was found that electrodeposited nanoparticles had an average particle size of 4.1 ± 0.8 nm. Pt/SWCNTs were used as sensing material for methane (CH4) detection and showed improved sensing properties in a range of concentration from 50 ppm to 200 ppm parts per million (ppm) at room temperature, when compared to other Pt/CNTs-based sensors. The use of this technique for the preparation of Pt/SWCNTs opens a new possibility in the bulk preparation of samples using an electrochemical method and thus their potential use in a wide variety of applications in chemical sensing, fuel cell and others.
authors.affiliation: NASA-URC Center for Advanced Nanoscale Materials, Department of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan 00936-8377, Puerto Rico.
authors.forename: Enid Contes-de
authors.initials: EC
authors.lastname: Jesus
authors.affiliation: NASA-URC Center for Advanced Nanoscale Materials, Department of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan 00936-8377, Puerto Rico.
authors.forename: Diana
authors.initials: D
authors.lastname: Santiago
authors.affiliation: Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, 78249 San Antonio, Texas, USA.
authors.forename: Gilberto
authors.initials: G
authors.lastname: Casillas
authors.affiliation: Laboratorio de Microscopias Avanzadas, Instituto de Nanociencia de Aragon, Universidad de Zaragoza, 50018 Zaragoza, Spain.
authors.forename: Alvaro
authors.initials: A
authors.lastname: Mayoral
authors.affiliation: Laboratorio de Microscopias Avanzadas, Instituto de Nanociencia de Aragon, Universidad de Zaragoza, 50018 Zaragoza, Spain ; Departamento de Fisica de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain.
authors.forename: Cesar
authors.initials: C
authors.lastname: Magen
authors.affiliation: Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, 78249 San Antonio, Texas, USA.
authors.forename: Miguel
authors.initials: M
authors.lastname: José-Yacaman
authors.affiliation: Center for Nanotechnology, NASA Ames Research Center, Moffett Field, California 94035, USA.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: NASA-URC Center for Advanced Nanoscale Materials, Department of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan 00936-8377, Puerto Rico.
authors.forename: Carlos R
authors.initials: CR
authors.lastname: Cabrera