Laboratoire de réactivité de surface

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  • Article dans une revue

Sorption of Cu(II) onto vineyard soils: macroscopic and spectroscopic investigations

Eric Marceau, Lorenzo Stievano

The sorption of Cu on five vineyard soils was examined via macroscopic and spectroscopic investigations. The composition of the soils was previously determined using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). X-ray absorption spectroscopy (XAS) was employed to determine the…

Journal of Colloid and Interface Science, 2007, 307, pp.40-49. ⟨10.1016/j.jcis.2006.10.080⟩. ⟨hal-00133593⟩

  • Article dans une revue

Adsorption of L-Lysine on Cu(110): A RAIRS study from UHV to the liquid phase

Vincent Humblot, Christophe Méthivier, Claire-Marie Pradier

Adsorption of L-Lysine on a Cu(110) surface has been investigated under UHV condition from sublimation of a crystalline phase. The adsorption was characterised by Fourier Transform Reflection Absorption Infrared Spectroscopy (FT-RAIRS) during exposure and Auger Electron Spectroscopy (AES). At room…

Langmuir, 2006, 22, pp.3089-3096. ⟨10.1021/La0533866⟩. ⟨hal-00022056⟩

  • Article dans une revue

Thermodynamic brønsted basicity of clean MgO surfaces determined by their deprotonation ability: Role of Mg2+–O2 pairs

Céline Chizallet, Marie Laurence Bailly, Guylène Costentin, Hélène Lauron-Pernot, Jean Marc Krafft, Philippe Bazin, Jacques Saussey, Michel Che

The deprotonation ability of clean (i.e., carbonate- and hydroxyl-free) MgO surfaces of various morphologies towards protic molecules, such as propyne and methanol, is evaluated by following the adsorption modes and amount of dissociated species by FTIR. Photoluminescence is used to identify the…

Catalysis Today, 2006, 116, pp.196-205. ⟨10.1016/j.cattod.2006.01.030⟩. ⟨hal-00112162⟩

  • Article dans une revue

1H MAS NMR study of the coordination of hydroxyl groups generated upon adsorption of H2O and CD3OH on clean MgO surfaces

Céline Chizallet, Guylène Costentin, Hélène Lauron-Pernot, Jocelyne Maquet, Michel Che

The coordination of OH groups on MgO has been characterized by 1H MAS NMR after appropriate pre-treatment conditions to obtain surfaces free from carbonates and with a controlled degree of hydroxylation. On MgO-sol–gel sample treated at 1023 K under flowing nitrogen, hydroxylated with water and…

Applied Catalysis A: General, 2006, 307, pp.239-244. ⟨10.1016/j.apcata.2006.03.056⟩. ⟨hal-00112138⟩

  • Article dans une revue

Controlled preparation of CoPdSiBEA zeolite catalysts for selective catalytic reduction of NO with methane and their characterisation by XRD, DR UV-vis, TPR, XPS

Ana Rodrigues, Patrick da Costa, C. Methivier, S. Dzwigaj

The Pd0.15SiBEA and CoxPd0.15SiBEA zeolites (where x= 1.0 and 3.0 wt.% Co) are prepared by a two-step postsynthesis method which allows to control the introduction of palladium and cobalt into zeolite and thus to obtain catalysts with specific bimetallic Pd and Co sites. The effect of Co content on…

Catalysis Today, 2011, 176, pp.72-76. ⟨10.1016/j.cattod.2011.03.013⟩. ⟨hal-00666188⟩

  • Article dans une revue

Group V metal substitution in silicate model zeolites: In search for the active site

Frederik Tielens, Stanislaw Dzwigaj

Group V substituted zeolites were characterized using periodic DFT. It is found that the group V sites in zeolite materials become more hydrophobic and less reducible descending the column of the Period Table. The stable site with T=O group for T = V, transforms into a site with T-OH group for T =…

Chemical Physics Letters, 2010, 501 (1-3), pp.59-63. ⟨10.1016/j.cplett.2010.10.038⟩. ⟨hal-00604803⟩

  • Article dans une revue

Adsorption properties of Fe-containing dealuminated BEA zeolites as revealed by FTIR spectroscopy

Konstantin Hadjiivanov, Elena Ivanova, Radoslav Kefirov, Janusz Janas, Anna Plesniar, Stanislaw Dzwigaj, Michel Che

Adsorption properties of Fe-containing dealuminated BEA zeolites were investigated by FTIR spectroscopy of adsorbed CO and NO. Two Fe-containing SiBEA zeolite samples were prepared by a two-step post-synthesis method: creation of vacant T-atom sites (T = Si, Al) by dealumination of…

Microporous and Mesoporous Materials, 2010, 131 (1-3), pp.1-12. ⟨10.1016/j.micromeso.2009.11.034⟩. ⟨hal-00604721⟩

  • Article dans une revue

The role of the synthesis method in the structure formation of cobalt aluminate

Thomas Onfroy, Wen-Cui Li, Ferdi Schueth, Helmut Knoezinger

Cobalt aluminate (spinel) was prepd. via two synthesis routes firstly a co-pptn. method and secondly a nanocasting method. The surface chem. of these materials was characterized by IR-spectroscopy of the surface hydroxyl groups and of coordinatively unsatd. (cus) cations (Al and Co) by carbon…

Topics in Catalysis, 2011, 54 (5-7), pp.390-397. ⟨10.1007/s11244-011-9669-y⟩. ⟨hal-00602945⟩

  • Article dans une revue

Quantitative relationship between the nature of surface species and the catalytic activity of tungsten oxides supported on crystallized titania

Thomas Onfroy, Vanessa Lebarbier, Guillaume Clet, Marwan Houalla

A series of WOx/TiO2 catalysts contg. between 0.6 and 3.4 W at./nm2 was prepd. by pore vol. impregnation using ammonium metatungstate soln. on crystd. TiO2. Characterization of the solids by X-ray diffraction and Raman and IR spectroscopy indicated that the W phase was present essentially as a…

Journal of Molecular Catalysis A: Chemical, 2010, 318 (1-2), pp.1-7. ⟨10.1016/j.molcata.2009.11.013⟩. ⟨hal-00604787⟩

  • Article dans une revue

Vanadium-containing SBA-15 systems prepared by direct synthesis: physicochemical and catalytic properties in the decomposition of dichloromethane

Marco Piumetti, Barbara Bonelli, Marco Armandi, Lucia Gaberova, Sandra Casale, Pascale Massiani, Edoardo Garrone

Vx/SBA-15 catalysts (V content = 0.7-4.8 wt.%) were directly synthesized and tested for the oxidative decompn. of dichloromethane; impregnation-synthesized SBA-15 and V/SBA-15 catalysts were ref. samples. Catalyst structural and surface properties were characterized by complementary physicochem.…

Microporous and Mesoporous Materials, 2010, 133 (1-3), pp.36-44. ⟨10.1016/j.micromeso.2010.04.011⟩. ⟨hal-00604792⟩