Synergetic effect of Ni and Au nanoparticles synthesized on titania particles for efficient photocatalytic hydrogen production
| Autor: | Patricia Beaunier, Ana Laura Luna, Ewa Kowalska, Ekaterina Novoseltceva, Hynd Remita, Christophe Colbeau-Justin, Essyllt Louarn, Bunsho Ohtani, Miguel A. Valenzuela |
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| Přispěvatelé: | Laboratoire de Chimie Physique D'Orsay (LCPO), Université Paris-Sud - Paris 11 (UP11)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Hokkaido University [Sapporo, Japan] |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Diffuse reflectance infrared fourier transform Inorganic chemistry Nanoparticle 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Catalysis Action spectra X-ray photoelectron spectroscopy Ni:Au/TiO2 Radiolysis [CHIM]Chemical Sciences High-resolution transmission electron microscopy Spectroscopy General Environmental Science Hydrogen production TRMC Process Chemistry and Technology 021001 nanoscience & nanotechnology 0104 chemical sciences Photocatalytic H2 production Photocatalysis Atomic ratio 0210 nano-technology Nuclear chemistry |
| Zdroj: | Applied Catalysis B: Environmental Applied Catalysis B: Environmental, Elsevier, 2016, 191, pp.18-28. ⟨10.1016/j.apcatb.2016.03.008⟩ Applied Catalysis B: Environmental, 2016, 191, pp.18-28. ⟨10.1016/j.apcatb.2016.03.008⟩ |
| ISSN: | 0926-3373 |
| Popis: | International audience; Au and/or Ni nanoparticles were synthesized by radiolysis on TiO2 (commercial P25) at various composition (metal content). The modified photocatalysts were characterized by High Resolution Transmission Microscopy (HRTEM), Energy-Dispersive X-ray Spectroscopy (EDS), UV–vis Diffuse Reflectance Spectroscopy (DRS) and X-ray Photoelectron Spectroscopy (XPS). The charge-carrier mobility was studied by Time Resolved Microwave Conductivity (TRMC). The photocatalytic activities were tested under UV–vis irradiation using polychromatic and monochromatic light (action spectrum analysis of apparent quantum efficiency). Surface modified TiO2 with Au and Ni nanoparticles showed high photocatalytic activity for hydrogen evolution from aqueous methanol solution. The enhanced hydrogen evolution rate was obtained for TiO2 co-modified with Au and Ni, where synergetic effect of the two metals was revealed. A very small amount of gold associated to nickel (atomic ratio Ni:Au 5:1 with a total optimized metal loading of 0.5 at%) can induce a significant increase in H2 formation. |
| Databáze: | OpenAIRE |
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