• Article dans une revue

A Study of Cobalt Speciation in Co/Al2O3 Catalysts Prepared from Solutions of Cobalt-Ethylenediamine Complexes

François Dumond, Eric Marceau, Michel Che

The thermal reduction of Co/Al2O3 catalysts prepared by impregnation of Co(II) nitrate generally leads to migration of cobalt ions into alumina with formation of cobalt aluminate. In order to prevent the latter, it is attempted to reduce cobalt by decomposition of supported precursor salts…

Journal of Physical Chemistry C, 2007, 111 (12), pp.4780-4789. ⟨10.1021/jp067781w⟩. ⟨hal-00143721⟩

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Influence of the nature of the reducible support on CO oxidation kinetics of supported Rhd+ catalysts: SnO2 versus Ce0.68Zr0.32O2

Céline Fontaine-Gautrelet, Cyril Thomas, Gérald Djéga-Mariadassou

CO-O2 kinetics was studied on Rh(0.3wt%)/SnO2 and compared with that reported previously on Rh/Ce0.68Zr0.32O2. The lower oxygen mobility on SnO2 and the stronger bonding of CO with the RhΔ+ sites of Rh/SnO2, are suggested to account for the lower CO oxidation activity of Rh/SnO2 compared with that…

Topics in Catalysis, 2007, 42-43, pp.363-366. ⟨10.1007/s11244-007-0206-y⟩. ⟨hal-00157011⟩

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Contribution to the understanding of the formation mechanism of bimodal mesoporous MCM41-type silica with large defect cavities

Claudia Bernal, Monica Mesa, Maguy Jaber, Jean-Louis Guth, Ligia Sierra

The formation mechanism of large defect cavities (∅ 11-23 nm) beside the MCM41 mesopores (∅ ∼ 2.3 nm), was studied from mixtures of sodium silicate, cetyl trimethyl ammonium bromide (CTAB) and ethyl acetate (EtAc) with the molar composition 1 SiO2; 1 Na2O; x CTAB; y EtAc: 237 H2O (with x = 0.33 or…

Microporous and Mesoporous Materials, 2011, 153, pp.217-226. ⟨10.1016/j.micromeso.2011.12.049⟩. ⟨hal-00688611⟩

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Unravelling the enhanced reactivity of bulk CeO2 doped with gallium: A periodic DFT study

Paola Quaino, Olga Syzgantseva, Luca Siffert, Frederik Tielens, Christian Minot, Monica Calatayud

Doping CeO2 with gallium leads to promising materials with application in hydrogen purification processes for fuel cells. The bulk ceria-gallia is investigated by ab initio calculations. The outstanding reactivity is explained by important relaxations induced by gallium in the ceria host, having a…

Chemical Physics Letters, 2011, 519-520, pp.69-72. ⟨10.1016/j.cplett.2011.11.022⟩. ⟨hal-00690790⟩

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DFT study of the M segregation on MAu alloys (M = Ni, Pd, Pt) in presence of adsorbed oxygen O and O2

Adnene Dhouib, Hazar Guesmi

Segregation phenomena of group 10 (M = Ni, Pd, Pt) transition-metals substituted in Au (1 1 1) surface and sub-surface layers are investigated by DFT periodic calculations in presence of adsorbed atomic and molecular oxygen. In contrast with vacuum conditions, where the metal impurities M prefer to…

Chemical Physics Letters, 2011, 521, pp.98-103. ⟨10.1016/j.cplett.2011.11.050⟩. ⟨hal-00690803⟩

• Article dans une revue

DFT study of the adsorption of microsolvated glycine on a hydrophilic amorphous silica surface

Dominique Costa, Asma Tougerti, Frederik Tielens, Christel Gervais, Lorenzo Stievano, Jean-François Lambert

Physical Chemistry Chemical Physics, 2008, 10 (42), pp.6360-6368. ⟨10.1039/B806501B⟩. ⟨hal-00799212⟩

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Bimetallic Au-Pd catalysts for selective hydrogenation of butadiene: Influence of the preparation method on catalytic properties

N. El Kolli, L. Delannoy, C. Louis

Supported Au catalysts modified by the addition of small amount of Pd (Au/Pd atomic ratio (10) were prepared according to three different methods, co-deposition-precipitation with urea (DPU), deposition of colloids stabilised either by polyvinyl alcohol (PVA) or by tetrakis (hydroxypropyl)…

Journal of Catalysis, 2012, 297, pp.79-92. ⟨10.1016/j.jcat.2012.09.022⟩. ⟨hal-00809388⟩

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Kinetic effects in dehydration, rehydration, and isotopic exchange of bacterial photosynthetic reaction centers

Marco Malferrari, Francesco Francia, Alberto Mezzetti, Giovanni Venturoli, Klaus Gerwert

BACKGROUND:In IR difference spectroscopy of proteins and biological systems, as in many other biophysical techniques, experiments at different hydration levels, and after H/D or H216O/H218O exchange are particularly important, for band assignment and for mechanistic studies. OBJECTIVE:Evaluate the…

Biomedical Spectroscopy and Imaging, 2016, 5 (2), pp.185 - 196. ⟨10.3233/BSI-160136⟩. ⟨hal-01547861⟩

• Communication dans un congrès

Influence des paramètres d’ultrasons sur les propriétés catalytiques des catalyseurs HDL à base de Ni dans la méthanation du CO2

Michel Obeid, Christophe Poupin, Madona Labaki, Samer Aouad, François Delattre, François Devred, Ferdaous Ben Romdhane, Eric Gaigneaux, Josefine Schnee, Edmond Abi-Aad

GECat 2023, Jun 2023, Dunkerque, France. ⟨hal-04346571⟩

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Going through the wine fining: Intimate dialogue between organics and clays

Pollyana Trigueiro, Silvia Pedetti, Baptiste Rigaud, Sebastien Balme, Jean-Marc Janot, Ieda M G Dos Santos, Régis Gougeon, Maria G Fonseca, Thomas Georgelin, Maguy Jaber

Wine chemistry inspires and challenges with its complexity and intriguing composition. In this context, the composites based on the use of a model protein, a polyphenol of interest and montmorillonite in a model hydroalcoholic solution have been studied. A set of experimental characterization…

Colloids and Surfaces B: Biointerfaces, 2018, 166, pp.79 - 88. ⟨10.1016/j.colsurfb.2018.02.060⟩. ⟨hal-01744266⟩