Articles producció científica> Enginyeria Química

Pd/TiO2-WO3photocatalysts for hydrogen generation from water-methanol mixtures

  • Dades identificatives

    Identificador: imarina:4090806
    Autors:
    Toledo Camacho, Sandra YuraniRey, AnaDolores Hernandez-Alonso, MariaLlorca, JordiMedina, FranciscoContreras, Sandra
    Resum:
    © 2018 Elsevier B.V. Solar light is inexhaustible, and therefore to take advantage of this energy it is necessary to develop materials capable of absorbing energy in the widest range of the solar spectra. Although TiO2is one of the most studied photocatalysts, it only absorbs in the UV range. With the aim of increasing this light absorption towards the visible range, in this study Pd and WO3were supported on bare TiO2to determine their photocatalytic properties for generating hydrogen from water-methanol mixtures under UVA and solar irradiation. Several parameters for the hydrogen production, such as the amount of Pd and the catalyst as well as the influence of the water matrix were studied. These catalytic materials were characterized by means of inductively coupled plasma with an optical emission spectrophotometer, nitrogen adsorption-desorption isotherms, X-ray diffraction, high resolution – transmission electron microscopy, X-ray photoelectron spectroscopy and diffuse reflectance UV–Vis spectroscopy. The hydrogen evolution was monitored by online gas chromatography. The incorporation of a small amount of Pd (lower than 0.01 wt%) produced a large increase in the hydrogen production. Furthermore, adding WO3on the bare titania also increased hydrogen generation. The highest quantum efficiency obtained in this work under solar radiation was 7.7% by the catalyst based on palladium supported on nanotubes of titanium dioxide and tungsten trioxide (Pd/NT-WO3) using an aqueous solution of methanol (50 vol%).
  • Altres:

    Autor segons l'article: Toledo Camacho, Sandra Yurani; Rey, Ana; Dolores Hernandez-Alonso, Maria; Llorca, Jordi; Medina, Francisco; Contreras, Sandra
    Departament: Enginyeria Química
    Autor/s de la URV: Contreras Iglesias, Sandra / Medina Cabello, Francisco
    Paraules clau: Sacrificial agents Quantum efficiency Photocatalysis Palladium catalysts Low palladium addition Hydrogen
    Resum: © 2018 Elsevier B.V. Solar light is inexhaustible, and therefore to take advantage of this energy it is necessary to develop materials capable of absorbing energy in the widest range of the solar spectra. Although TiO2is one of the most studied photocatalysts, it only absorbs in the UV range. With the aim of increasing this light absorption towards the visible range, in this study Pd and WO3were supported on bare TiO2to determine their photocatalytic properties for generating hydrogen from water-methanol mixtures under UVA and solar irradiation. Several parameters for the hydrogen production, such as the amount of Pd and the catalyst as well as the influence of the water matrix were studied. These catalytic materials were characterized by means of inductively coupled plasma with an optical emission spectrophotometer, nitrogen adsorption-desorption isotherms, X-ray diffraction, high resolution – transmission electron microscopy, X-ray photoelectron spectroscopy and diffuse reflectance UV–Vis spectroscopy. The hydrogen evolution was monitored by online gas chromatography. The incorporation of a small amount of Pd (lower than 0.01 wt%) produced a large increase in the hydrogen production. Furthermore, adding WO3on the bare titania also increased hydrogen generation. The highest quantum efficiency obtained in this work under solar radiation was 7.7% by the catalyst based on palladium supported on nanotubes of titanium dioxide and tungsten trioxide (Pd/NT-WO3) using an aqueous solution of methanol (50 vol%).
    Àrees temàtiques: Zootecnia / recursos pesqueiros Surfaces, coatings and films Surfaces and interfaces Saúde coletiva Química Physics, condensed matter Physics, applied Physics and astronomy (miscellaneous) Physics and astronomy (all) Odontología Medicina iii Medicina ii Materials science, coatings & films Materiais Matemática / probabilidade e estatística Interdisciplinar Geociências General physics and astronomy General chemistry Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Engenharias i Condensed matter physics Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Chemistry, physical Chemistry (miscellaneous) Chemistry (all) Biotecnología Biodiversidade Astronomia / física
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 01694332
    Adreça de correu electrònic de l'autor: sandra.contreras@urv.cat francesc.medina@urv.cat
    Identificador de l'autor: 0000-0001-8917-4733 0000-0002-3111-1542
    Data d'alta del registre: 2024-10-12
    Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
    Enllaç font original: https://www.sciencedirect.com/science/article/pii/S0169433218314193
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Applied Surface Science. 455 570-580
    Referència de l'ítem segons les normes APA: Toledo Camacho, Sandra Yurani; Rey, Ana; Dolores Hernandez-Alonso, Maria; Llorca, Jordi; Medina, Francisco; Contreras, Sandra (2018). Pd/TiO2-WO3photocatalysts for hydrogen generation from water-methanol mixtures. Applied Surface Science, 455(), 570-580. DOI: 10.1016/j.apsusc.2018.05.122
    DOI de l'article: 10.1016/j.apsusc.2018.05.122
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2018
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Chemistry (Miscellaneous),Chemistry, Physical,Condensed Matter Physics,Materials Science, Coatings & Films,Physics and Astronomy (Miscellaneous),Physics, Applied,Physics, Condensed Matter,Surfaces and Interfaces,Surfaces, Coatings and Films
    Sacrificial agents
    Quantum efficiency
    Photocatalysis
    Palladium catalysts
    Low palladium addition
    Hydrogen
    Zootecnia / recursos pesqueiros
    Surfaces, coatings and films
    Surfaces and interfaces
    Saúde coletiva
    Química
    Physics, condensed matter
    Physics, applied
    Physics and astronomy (miscellaneous)
    Physics and astronomy (all)
    Odontología
    Medicina iii
    Medicina ii
    Materials science, coatings & films
    Materiais
    Matemática / probabilidade e estatística
    Interdisciplinar
    Geociências
    General physics and astronomy
    General chemistry
    Farmacia
    Ensino
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Engenharias i
    Condensed matter physics
    Ciências biológicas iii
    Ciências biológicas ii
    Ciências biológicas i
    Ciências ambientais
    Ciências agrárias i
    Chemistry, physical
    Chemistry (miscellaneous)
    Chemistry (all)
    Biotecnología
    Biodiversidade
    Astronomia / física
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