• Article dans une revue

Promoting Ag/Al2O3 Performance in Low-Temperature H2-C3H6-SCR by Thermal Pretreatment of γ-Alumina in Water

Tesnim Chaieb, Laurent Delannoy, Catherine Louis, Cyril Thomas

The present work highlights for the first time that a thermal treatment of γ-Al2O3 in water at 80 °C for 24 h prior to Ag deposition (Ag/Al2O3-OH) leads to a drastic enhancement of H2-C3H6-SCR performance at low temperature. This enhancement is attributed to the higher NOx coverage on Ag/Al2O3-OH…

Catalysis Letters, 2016, pp.1-8. ⟨10.1007/s10562-016-1864-9⟩. ⟨hal-01390045⟩

• Article dans une revue

Acidic Properties of Alkaline-Earth Phosphates Determined by an Experimental-Theoretical Approach

E. Blanco, Q. Gu, J. Couble, L. Martin, T. Onfroy, G. Costentin, Jean-Francois Paul, Carine Michel, S. Loridant

Alkaline-earth phosphates efficient in the dehydration of lactic acid to acrylic acid were previously shown to contain a surface mono/dihydrogen phosphate amorphous layer composed of M2+ cations and both P═O and POH groups. In this work, acidic properties of such a layer were determined combining…

Journal of Physical Chemistry C, 2020, 124 (3), pp.2013-2023. ⟨10.1021/acs.jpcc.9b10472⟩. ⟨hal-02472130⟩

• Article dans une revue

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⟩

• 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⟩

• Communication dans un congrès

Structural and computational analysis of Y0.88Ni3-xMnx compounds to understand the localization of Mn atoms

J Monnier, J Zhang, G Fedlouk, J Chan, L Lei, S Ling, L. Laversenne, E Kurchavova, M Turmine, V Vivier, M Mateos, F Cuevas

Intermetallic compounds ABn (A=rare earth, Mg; B=early transition metal, 2≤n≤5) can store large amount of hydrogen. They have been investigated as negative electrode materials for Ni-MH batteries due to their outstanding electrochemical properties, including in new protic ionic liquid (PIL)…

Association Française de Cristallographie, Jul 2024, Montpellier, France. ⟨hal-04958759v2⟩

• Article dans une revue

Activity of molybdenum and tungsten oxycarbides in hydrodenitrogenation of carbazole leading to isomerization secondary reaction of bicyclohexyl. Results using bicyclohexyl as feedstock

Marek Lewandowski, Agnieszka Szymańska-Kolasa, Céline Sayag, Gérald Djéga-Mariadassou

The catalytic activities of bulk tungsten and molybdenum oxycarbides, (W2C and Mo2C) have been specifically studied in the isomerization occurring during the hydrodenitrogenation (HDN) of carbazole. The two catalysts have been characterized by several physico-chemical techniques such as X-Ray…

Applied Catalysis B: Environmental, 2020, 261, pp.118239. ⟨10.1016/j.apcatb.2019.118239⟩. ⟨hal-04024756⟩

• 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

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⟩

• Article dans une revue

Adsorption of l-DOPA Intercalated in Hydrated Na-Saponite Clay: A Combined Experimental and Theoretical Study

K. El Adraa, V. Timon, J.-F. Lambert, Abdel-Rahman Al-Rabaa, F. Jaber, M. Jaber, Frederik Tielens

The intercalation of L-DOPA into the interlayer space of saponite, a 2:1 phyllosilicate, and the nature of host−guest interactions are investigated by a combined experimental and theoretical approach. L-DOPA zwitterions are accommodated vertically in the interlayer region as a bilayer of partially…

Journal of Physical Chemistry C, 2012, 116, pp.26414−26421. ⟨10.1021/jp3094148⟩. ⟨hal-00808607⟩

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Importance of the Nature of the Active Acid/Base Pairs of Hydroxyapatite Involved in the Catalytic Transformation of Ethanol to n ‐Butanol Revealed by Operando DRIFTS

Manel Ben Osman, Jean‐marc Krafft, Cyril Thomas, Tetsuya Yoshioka, Jun Kubo, Guylène Costentin

Operando DRIFTS is used to identify the nature and the role of the surface sites of hydroxyapatites (HAps) involved in the catalytic transformation of ethanol to n‐butanol. The surface processes occurring upon a first reaction step followed by a step under He flow greatly influence the reactivity…

ChemCatChem, 2019, 11 (6), pp.1765-1778. ⟨10.1002/cctc.201801880⟩. ⟨hal-02168502⟩