• Article dans une revue

Hydrodesulfurization of dibenzothiophene on MoS2/MCM-41 and MoS2/SBA 15 catalysts prepared by thermal spreading of MoO3.

A. Sampieri-Croda, Stéphane Pronier, Joël Blanchard, Michèle Breysse, Sylvette Brunet, Katia Fajerwerg, C. Louis, Guy Perot

Catalysis Today, 2005, 107-108, pp.537-544. ⟨10.1016/j.cattod.2005.07.069⟩. ⟨hal-00288833⟩

• 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⟩

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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⟩

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A DNA biosensor based on peptide nucleic acids on gold surfaces

Eva Mateo-Marti, C. Briones, Claire-Marie Pradier, Jose A. Martin-Gago

We present a DNA biosensor based on self assembled monolayers (SAMs) of thiol-derivatized Peptide nucleic acid (PNA) chains adsorbed on gold surfaces for recognizing complementary ssDNA. PNA molecules tend to realign their molecular axes parallel to the surface normal and form SAMs on gold surfaces…

Biosensors and Bioelectronics, 2006, 22, pp.1926-1932. ⟨10.1016/j.bios.2006.08.012⟩. ⟨hal-00138700⟩

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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⟩

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Carbon black composites—supports of HDS catalysts

P. Gheek, S. Suppan, J. Trawczynski, A. Hynaux, Celine Sayag, G. Djéga-Mariadassou

HDS activity of sulfided Mo (W) catalysts supported on carbon black composites (CBC) is affected by kind of functional groups present on the CBC surface. Oxidation of CBC with (NH4)2S2O8 produce functionalities with the highest acid strength and corresponding catalyst exhibits the highest HDS…

Catalysis Today, 2006, 119, pp.19-22. ⟨10.1016/j.cattod.2006.08.026⟩. ⟨hal-00128078⟩

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Kinetic study of the deep hydrodesulfurization of dibenzothiophene over molybdenum carbide supported on a carbon black composite: Existence of two types of active sites

A. Hynaux, Celine Sayag, S. Suppan, J. Trawczynski, M. H. Lewandowski, A. Szymanska-Kolasa, G. Djéga-Mariadassou

Hydrodesulfurization (HDS) is part of the hydrotreating process, which is an ensemble of several reactions (HDN, HDO, HDS, etc.) taking place simultaneously at the industrial scale. Only sulfur is currently submitted to drastic Europeans specifications and conventional commercial catalysts cannot…

Catalysis Today, 2006, 119, pp.3-6. ⟨10.1016/j.cattod.2006.08.053⟩. ⟨hal-00128095⟩

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Reactivity of oxygen species formed upon N2O dissociation over Fe-ZSM-5 zeolite: CO oxidation as a model

Hazar Guesmi, Dorothée Berthomieu, Lioubov Kiwi-Minsker

The oxidative power toward CO of α-oxygen formed upon N2O dissociation over isolated and binuclear Fe/ZSM-5 zeolite is investigated by means of DFT calculations. The two α-sites [Fe-O]+ and [Fe-(μO)-(μOH)-Fe]+ exchanged in ZSM-5 were considered since their activity in the N2O decomposition was…

Catalysis Communications, 2010, 11 (12), pp.1026-1031. ⟨10.1016/j.catcom.2010.05.001⟩. ⟨hal-00489623⟩

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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⟩

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Catalytic Aspects of Light-Induced Hydrogen Generation in Water with TiO2 and Other Photocatalysts: A Simple and Practical Way Towards a Normalization?

Thomas Maschmeyer, Michel Che

Evaluation is discussed of performance of solid photocatalysts for H2 generation from H2O so that they can be compared in a simple way whether sacrificial soln. is used or not. The addnl. chem. potential present in a sacrificial soln. will be the same regardless of the catalyst system used, so…

Angewandte Chemie International Edition, 2010, 49 (9), pp.1536-1539. ⟨10.1002/anie.200903921⟩. ⟨hal-00604779⟩