• Article dans une revue

Insights into the WOx Coverage-Dependent Location and Oxidation State of Noble Metals Supported on Tungstated Oxides: The Case of Rh/WOx−Ce0.62Zr0.38O2

Thomas Bonnotte, Rachel P. Doherty, Céline Sayag, Jean-Marc Krafft, Christophe Méthivier, Mickaël Sicard, Frédéric Ser, Cyril Thomas

Noble metals-promoted tungstated oxides have been shown to be profitable in a wide variety of catalytic reactions of environmental interest but to be detrimental in the hydrogenation of aromatics. The origin of the deleterious effect of tungstates on the hydrogenation performance of noble metals is…

Journal of Physical Chemistry C, 2014, 118, pp.7386−7397. ⟨10.1021/jp410848f⟩. ⟨hal-00979525⟩

• Article dans une revue

Porosity Design of Shaped Zeolites for Improved Catalyst Lifetime in the Methanol-to-Hydrocarbons Reaction

Rogéria Bingre, Renna Li, Qiang Wang, Patrick Nguyen, Thomas Onfroy, Benoit Louis

Additional porosity, such as meso-and macropores, was introduced in zeolite extrudates with the intention intuit of improving the effective diffusivity of the catalysts. The samples were characterized in depth by nitrogen adsorption-desorption, mercury intrusion porosimetry, ammonia temperature…

Catalysts, 2019, 9 (6), pp.545. ⟨10.3390/catal9060545⟩. ⟨hal-02271909⟩

• Article dans une revue

Surface passivation of aluminum alloy 6061 with gaseous trichlorosilane: A surface investigation

Rickielle Ngongang, Eric Marceau, Xavier Carrier, Claire-Marie Pradier, Christophe Méthivier, Jean-Luc Blanc, Martine Carré

A molecular-scale investigation of the interaction at room temperature between gaseous trichlorosilane (HSiCl3), used as a passivating agent, and surfaces of aluminum alloy AA6061 in a polished or hydroxylated state is conducted. Atomic force microscopy (AFM) and scanning electron microscopy (SEM)…

Applied Surface Science, 2014, 292, pp.165-173. ⟨10.1016/j.apsusc.2013.11.107⟩. ⟨hal-00982188⟩

• Article dans une revue

Development of a thermodynamic approach to assist the control of the precipitation of hydroxyapatites and associated calcium phosphates in open systems

Corentin Reynaud, Cyril Thomas, Sandra Casale, Sophie Nowak, Guylène Costentin

The understanding of the precipitation mechanisms of calcium phosphates (CaPs) remains extremely challenging despite its fundamental interest for material sciences and its practical implications in medicine, paleosciences, and chemistry, especially for heterogeneous catalysis. The competitive…

CrystEngComm, 2021, 23 (27), pp.4857-4870. ⟨10.1039/D1CE00482D⟩. ⟨hal-03343001⟩

• Article dans une revue

Impregnation of .gamma.-Alumina with Ni(II) or Co(II) Ions at Neutral pH: Hydrotalcite-Type Coprecipitate Formation and Characterization

Jean-Baptiste d'Espinose de la Caillerie, Maggy Kermarec, Olivier Clause

The adsorption of Co(II) or Ni(II) ammine complexes from aqueous solutions onto y-alumina at neutral or near neutral pH (7 < pH < 8.2) and ambient temperature is investigated as a function of the ion concentration in the impregnating solutions, the contact and aging times, and the drying…

Journal of the American Chemical Society, 1995, 117 (46), pp.11471-11481. ⟨10.1021/ja00151a010⟩. ⟨hal-03978150⟩

• Article dans une revue

Ag–Ni bimetallic SiBEA zeolite as an efficient catalyst of hydrodechlorination of 1,2-dichloroethane towards ethylene

A Śrębowata, I Zielińska, R Baran, G Słowik, S Dzwigaj

Dealuminated form of BEA zeolite with Si/Al ratio of 1500 was used for the synthesis of Ag2.0SiBEA, Ni2.0SiBEA and Ag2.0Ni2.0SiBEA by two-step postsynthesis method. The calcination of zeolite samples led to the formation of well dispersed isolated mononuclear Ag(I) and Agnδ + clusters and a pseudo-…

Catalysis Communications, 2015, 69, pp.154-160. ⟨10.1016/j.catcom.2015.06.009⟩. ⟨hal-01171840⟩

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CO 2 methanation over LDH derived NiMgAl and NiMgAlFe oxides: Improving activity at lower temperatures via an ultrasound-assisted preparation

Michel Obeid, Christophe Poupin, Madona Labaki, Samer Aouad, Sharad Gupta, Haingomalala Lucette Tidahy, Aida Younis, Ferdaous Ben Romdhane, Eric Gaigneaux, Josefine Schnee, Edmond Abi-Aad, François Delattre

Within the idea to catalyze CO 2 methanation NiMgAl and NiMgAlFe oxides were synthesized by the layered double hydroxide route using co-precipitation and ultrasound-assisted co-precipitation. MgAl and MgAlFe oxides-supported Ni materials prepared by the impregnation method were used as references.…

Chemical Engineering Journal, 2023, 474, pp.145460. ⟨10.1016/j.cej.2023.145460⟩. ⟨hal-04212860⟩

• Poster de conférence

Fate of Organic Molecules in the Mars Regolith Under UV Radiation Deduced from the MOMIE Laboratory Experiment

Cyril Szopa, Patrice Coll, Fabien Stalport, Olivier Poch, Maguy Jaber, Jean-François Lambert, Laura Rouquette, Jérôme Lasne

Among bioindicators or biosigna- tures, organic molecules present on Mars could be re- trieved in the regolith near the surface due to erosion of rocks and gardening of the soil from meteorites bom- bardment through the Mars history. Once their, the organic molecules are submitted to the harsh…

• Article dans une revue

Ni exsolution from (NiO) (ZrO2)1- for catalytic CO2 valorization

Yuxin Deng, Sharad Gupta, Alexandre Carvalho, Christophe Poupin, Hélène Lauron-Pernot, Josefine Schnee

Nickel (Ni) exsolution from (NiO)x(ZrO2)1-x is presented here as an innovative strategy towards catalytic CO2 hydrogenation, contrasting with conventional catalyst preparation methods such as incipient wetness impregnation and bringing exsolution beyond the field of perovskites. This approach…

Chemical Engineering Journal, 2025, 524, pp.168712. ⟨10.1016/j.cej.2025.168712⟩. ⟨hal-05405467⟩

• Article dans une revue

Synergy between XANES spectroscopy and DFT to Elucidate the Amorphous Structure of Heterogeneous Catalysts: TiO2-Supported Molybdenium Oxide Catalysts

Asma Tougerti, Elise Berrier, Anne-Sophie Mamede, Camille La Fontaine, Valérie Briois, Yves Joly, Edmond Payen, Sylvain Cristol, J.F. Paul

Angewandte Chemie International Edition, 2013, 52, pp.6440. ⟨10.1002/ange.201300538⟩. ⟨hal-00855400⟩