• Article dans une revue

Dimerization of Uracil in a simulated Mars-like UV radiation environment

Laura Rouquette, Fabien Stalport, Hervé Cottin, Cyril Colas, Thomas Georgelin, Naïla Chaouche-Mechidal, Jerome Lasne, Sara Mahfouf, Franćois Raulin, Laura Selliez, Cyril Szopa, Patrice Coll

The search for organic molecules at the surface of Mars is a key objective in astrobiology, given that many organic compounds are possible biosignatures and their presence is of interest with regard to the habitability of Mars. Current environmental conditions at the martian surface are harsh and…

Astrobiology, 2020, 20 (11), pp.1363-1376. ⟨10.1089/ast.2019.2157⟩. ⟨hal-03032302⟩

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Ni/CeO2 Nanoparticles Promoted by Yttrium Doping as Catalysts for CO2 Methanation

Valeria La Parola, Chao Sun, Patricia Beaunier, Leonarda F Liotta, Patrick da Costa

Ni (5 wt.%) catalysts over yttrium modified CeO2 oxides synthesized by hydrothermal method were prepared. For comparison Ni was supported over pure CeO2 and Y2O3. Characterizations by N2 adsorption/desorption, XRD, XPS, TEM/HRTEM, H2-TPR, CO2-TPD and TGA were carried out. The catalytic performance…

ACS Applied Nano Materials, 2020, 3 (12), pp.12355-12368. ⟨10.1021/acsanm.0c02841⟩. ⟨hal-03146777⟩

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Optimization of Synthesis Conditions of Ni/SBA-15 Catalysts: Confined Nanoparticles and Improved Stability in Dry Reforming of Methane

Nissrine El Hassan, Marie-Nour Kaydouh, Nissrine El, Anne Davidson, Pascale Massiani

Despite its economic and environmental advantages, the dry reforming of methane using supported Ni-based catalysts remains challenging due to problems of metal particle sintering and carbon deposition, which lead to loss in catalytic activity. In this study, different silica supports, containing 5…

Catalysts, 2020, 11 (1), pp.44. ⟨10.3390/catal11010044⟩. ⟨hal-03146326⟩

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Nickel Coordination to Lattice Oxygens in Basic LSX, X and Y Sodium Faujasites: A DFT Study

Hazar Guesmi, Dominique Costa, Dorothée Berthomieu, Pascale Massiani

The location and coordination of nickel cations inside the hexagonal prism of dehydrated sodium faujasites have been investigated as a function of the framework Al content and distribution by density functional theory (DFT) calculations. Three different Si/Al ratios have been considered in order to…

Journal of Physical Chemistry C, 2011, 115 (13), pp.5607-5618. ⟨10.1021/jp108172t⟩. ⟨hal-00602938⟩

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Synthesis and Unique Catalytic Performance of Single-Site Ti-Containing Hierarchical Macroporous Silica with Mesoporous Frameworks

Takashi Kamegawa, Norihiko Suzuki, Michel Che, Hiromi Yamashita

Single-site Ti-containing hierarchical macroporous silica with mesoporous frameworks (Ti-MMS) was successfully prepared by a solvent evaporation method using organic surfactant and poly(methyl methacrylate) (PMMA) colloidal crystals as the template. The formation of a well-defined macroporous…

Langmuir, 2011, 27 (6), pp.2873-2879. ⟨10.1021/la1048634⟩. ⟨hal-00602941⟩

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Self-assembled multilayers based on native or denatured collagen: mechanism and synthesis of size-controlled nanotubes

Jessem Landoulsi, Sophie Demoustier-Champagne, Christine Dupont-Gillain

The mechanism of layer-by-layer (LbL) assembly using collagen, the major protein of the extracellular matrix, was investigated on flat substrates and in nanoporous templates, with a view to synthesize collagen-contg. nanotubes. The effect of parameters related to geometrical constraints (flat…

Soft Matter, 2011, 7 (7), pp.3337-3347. ⟨10.1039/C0SM00918K⟩. ⟨hal-00602942⟩

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Binding and 2D organization of arginine on Cu(1 1 0)

Roberta Totani, Christophe Méthivier, Dominique Costa, Théo Jaffrelot Inizan, Claire-Marie Pradier, Vincent Humblot

Applied Surface Science, 2020, 509, pp.144865. ⟨10.1016/j.apsusc.2019.144865⟩. ⟨hal-03012685⟩

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Controlling Magnesium Silicates Coprecipitation Conditions: A Tool to Tune Their Surface Acid–Base Reactivity

François Payan, Albert Issa, Jean-Marc Krafft, Yannick Millot, Thomas Onfroy, Capucine Sassoye, Jean-François Hochepied, Guillaume Laugel, Hélène Lauron-Pernot

Magnesium silicates combining acidic and basic surface properties are known to be interesting as heterogeneous catalysts. Nevertheless, their catalytic performances are highly dependent on the synthesis method used. In this study, a series of magnesium silicates was synthesized for the first time…

Catalysts, 2023, 13 (11), pp.1393. ⟨10.3390/catal13111393⟩. ⟨hal-04391661⟩

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Supported gold catalysts for the decomposition of VOC: Total oxidation of propene in low concentration as model reaction

Laurent Delannoy, Katia Fajerwerg, Pandian Lakshmanan, Claude Potvin, Christophe Methivier, Catherine Louis

Supported gold catalysts prepared by deposition-precipitation with urea were studied in the reaction of oxidation of propene in low concentration in a large excess of oxygen, so as to mimic the conditions of catalytic decomposition of a volatile organic compound of hydrocarbon-type (1200 ppm C3H6,…

Applied Catalysis B: Environmental, 2010, 94 (1-2), pp.117-124. ⟨hal-00604712⟩

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Self-Assembly of (S)-Glutamic Acid on Ag(100): A Combined LT-STM and Ab Initio Investigation

M. Smerieri, L. Vattuone, Dominique Costa, Frederik Tielens, L. Savio

Self-assembly of org. mols. at metal surfaces is of greatest importance in nanoscience; in fact, it opens new perspectives in the field of mol. electronics and in the study of biocompatible materials. Combining an exptl. low-temp. scanning tunneling microscopy investigation with ab initio calcns.,…

Langmuir, 2010, 26 (10), pp.7208-7215. ⟨10.1021/la904331d⟩. ⟨hal-00604800⟩