Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Jean Claude Volta"'
Publikováno v:
Catalysis Today. 118:416-424
The synthesis and characterization of NbSBA-3 mesostructured materials – the first hexagonally ordered mesoporous molecular sieves without extra framework Nb-oxide phase – are described in this paper. The effect of the synthesis medium (basic or
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 222:175-181
The modifications of vanadyl pyrophosphate (VPO) during the activation under propane/oxygen/water/nitrogen containing gaseous mixture have been studied and related to catalytic performances of the catalyst in the oxidation of propane to acrylic acid
Autor:
Richard P. K. Wells, Graham J. Hutchings, Christopher J. Kiely, Jonathan K. Bartley, Jean Claude Volta, Luisa Sartoni
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 220:85-92
The doping of vanadium phosphate catalysts by low levels of gallium is described an discussed. VOHPO 4 ·0.5H 2 O precursors doped with Ga were prepared using a two stage method in which V 2 O 5 is initially reacted with isobutanol before reaction wi
Autor:
Andrea Maria Duarte De Farias, Paulo Gustavo Pries de Oliveira, Wilma de Araujo Gonzalez, Jean-Claude Volta
Publikováno v:
Journal of Metastable and Nanocrystalline Materials. :523-528
Autor:
Izabela Sobczak, Maria Ziolek, Izabela Nowak, Maciej Trejda, Beata A. Kilos, Jean-Claude Volta, Piotr Decyk
Publikováno v:
Journal of Physics and Chemistry of Solids. 65:571-581
A series of metallosilicates (transition metal elements—TME) MCM-41 (TME=Fe, Cu, Nb, V, Mo) mesoporous molecular sieves with variable Si/TME ratios have been synthesized and characterised by low temperature N2 adsorption/desorption, XRD, XPS, H2-TP
Autor:
Ataullah Khan, Tetsuhiko Kobayashi, Stéphane Loridant, Yusuke Yamada, Beniaram M. Reddy, Jean-Claude Volta
Publikováno v:
Scopus-Elsevier
Microstructure evolution of ceria-based mixed oxides CeO2−MO2 (M = Si4+, Ti4+, and Zr4+) after thermal treatments in the temperature range of 773−1073 K were investigated by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectro
Autor:
Tetsuhiko Kobayashi, Benjaram M. Reddy, Jean-Claude Volta, Ataullah Khan, Stéphane Loridant, Yusuke Yamada
Publikováno v:
Langmuir. 19:3025-3030
The evolution and physicochemical characteristics of CeO2−ZrO2 and V2O5/CeO2−ZrO2 samples under the influence of thermal treatments from 773 to 1073 K were investigated using X-ray diffraction (XRD), BET surface area, Raman spectroscopy, and X-ra
Publikováno v:
Journal of Materials Chemistry. 13:125-129
(VO)2P2O7 was used as a catalyst for the partial oxidation of propane to oxygenates (acrylic acid and acetic acid) in dense carbon dioxide (2–10 MPa) at 673 K using air as the oxidant. The catalytic studies showed a decreasing yield of acrylic acid
Autor:
Tetsuhiko Kobayashi, Ataullah Khan, Jean-Claude Volta, Stéphane Loridant, Benjaram M. Reddy, Yusuke Yamada
Publikováno v:
The Journal of Physical Chemistry B. 106:10964-10972
X-ray diffraction, Raman, and X-ray photoelectron spectroscopy were utilized to characterize CeO2/SiO2 supports and V2O5/CeO2/SiO2 catalysts calcined at different temperatures from 773 to 1073 K. The CeO2/SiO2 support was obtained by an aqueous depos
Autor:
Stéphane Loridant, Paulo Gustaro Pries de Oliveira, Andrea Maria Duarte De Farias, Mimoun Aouine, Jean-Guillaume Eon, Jean-Claude Volta, Jean-Marie Herrmann, Wilma de Araujo Gonzalez
Publikováno v:
Journal of Catalysis. 208:238-246
The interest of doping (VO) 2 P 2 O 7 with Nb 5+ ions has been studied for n -butane oxidation to maleic anhydride. Nb was solubilized as niobium (V) ethoxide into isobutanol and used as a reducing reagent to prepare the VOHPO 4 ·0.5H 2 O precursor.