1. EXAFS Characterization of New Active Phases for Catalytic Hydrotreatment: Two Cations Disulfide Layers in the MoxW(1-x)S2Lamellar Solid Solution
- Author
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Christophe Geantet, Michel Lacroix, V. Harle, Michel Danot, Cecile Thomazeau, IFP Energies nouvelles (IFPEN), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), and Université de Nantes (UN)-Université de Nantes (UN)
- Subjects
[PHYS]Physics [physics] ,Extended X-ray absorption fine structure ,010405 organic chemistry ,Bond strength ,General Chemical Engineering ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Tungsten ,010402 general chemistry ,01 natural sciences ,0104 chemical sciences ,Catalysis ,Crystallography ,Fuel Technology ,chemistry ,Transition metal ,Molybdenum ,ddc:660 ,Lamellar structure ,Solid solution - Abstract
International audience; Synchrotron and Neutron Solutions to Oil Industry ProblemBulk and alumina-supported Mo0.5W0.5S2 compounds were prepared. The presence of both molybdenum and tungsten in every [MS2] layer (intralayer solid solution) was evidenced using EXAFS spectroscopy, the only local method which can provide such relevant structural information. The catalytic interest of such solid solution is to provide a continuous variation of M-S bond strength which is considered as the key parameter of the catalytic activity transition metal sulfides. The solid solution is maintained after promotion by Ni either on unsupported or supported state.
- Published
- 2005
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