• Article dans une revue

Calibrated Co3O4 nanoparticles patterned in SBA-15 3 silicas: Accessibility and activity for CO oxidation

Irène Lopes, Anne Davidson, Cyril Thomas

The catalytic performances in CO oxidation of Co3 O4 nanoparticles patterned in the porosity of SBA-15 silicas are investigated. 10 Accessibility limitations of the reactants to the catalytic sites are clearly revealed,when the Co3O4 nanoparticles are embedded in the 11 SBA-15 pores.Despite these…

Catalysis Communications, 2007, 8, pp.2105-2109. ⟨hal-00181045⟩

• Article dans une revue

Catalytic conversion of trichloroethylene on nickel containing beta zeolites into value added products

A. Śrębowata, R. Baran, D. Lisovytskiy, I.I. Kamińska, S. Dzwigaj

Nickel containing BEA zeolites, NiSiBEA and NiHAlBEA, with 2 wt% of Ni were prepared by a two-step postsynthesis method and conventional wet impregnation. The calcination of NiSiBEA and NiHAlBEA at 773 K for 3 h in air led to the formation of C-NiSiBEA and C-NiHAlBEA. After reduction at 873 K for 3…

Catalysis Communications, 2014, 57, pp.107-110. ⟨10.1016/j.catcom.2014.08.023⟩. ⟨hal-01117203⟩

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Observations of fast-moving features in the debris disk of AU Mic on a three-year timescale: Confirmation and new discoveries

A. Boccaletti, E. Sezestre, A.-M. Lagrange, P. Thebault, R. Gratton, M. Langlois, C. Thalmann, M. Janson, P. Delorme, J.-C. Augereau, G. Schneider, J. Milli, C. Grady, J. H Debes, Q. Kral, J. Olofsson, J. Carson, A. Maire, T. Henning, J. Wisniewski, J. Schlieder, C. Dominik, S. Desidera, C. Ginski, D. Hines, F. Menard, D. Mouillet, N. Pawellek, A. Vigan, Erwan M Lagadec, H. Avenhaus, J.-L. Beuzit, B. Biller, M. Bonavita, M. Bonnefoy, W. Brandner, F. Cantalloube, G. Chauvin, A. Cheetham, M. Cudel, C. Gry, S. Daemgen, M. Feldt, R. Galicher, J. Girard, J. Hagelberg, P. Janin-Potiron, M. Kasper, H. Le Coroller, D. Mesa, S. Peretti, C. Perrot, M. Samland, E. Sissa, F. Wildi, A. Zurlo, S. Rochat, E. Stadler, L. Gluck, A. Origné, M. Llored, P. Baudoz, G. Rousset, P. Martinez, F Rigal

Context. The nearby and young M star AU Mic is surrounded by a debris disk in which we previously identified a series of large-scale arch-like structures that have never been seen before in any other debris disk and that move outward at high velocities.Aims. We initiated a monitoring program with…

Astronomy & Astrophysics - A&A, 2018, 614, pp.A52. ⟨10.1051/0004-6361/201732462⟩. ⟨hal-02301370⟩

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Au/xCeO(2)/Al2O3 catalysts for VOC elimination: oxidation of 2-propanol

P. Lakshmanan, L. Delannoy, C. Louis, N. Bion, J.M. Tatibouet

2- Propanol oxidation (1 mol% in air) was investigated over 1% Au/CeO2, 1% Au/Al2O3 and 1% Au/xCeO(2)/Al2O3 (x = 1.5, 3, 5 and 10 wt%) catalysts and the corresponding pure supports. The effects of the catalyst activation procedure (calcination or reduction), cerium oxide morphology and loading, the…

Catalysis Science & Technology, 2013, 3 (11), pp.2918-2925. ⟨10.1039/c3cy00238a⟩. ⟨hal-00963532⟩

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Elucidation of the IR of Cu and Mn substituted intraframework SiBEA zeolites

Etienne Hessou, Michael Badawi, Laetitia Valentin, Guy Atohoun, Stanislaw Dzwigaj, Monica Calatayud, Frederik Tielens

Copper and manganese modified zeolites play key roles in selective oxidation catalytic reactions. Combining Density Functional Perturbation Theory (DFPT) implemented in VASP, and infrared spectroscopy experiments, we have studied and elucidated the incorporation of Cu 2+ and Mn 2+ in the framework…

Topics in Catalysis, 2022, ⟨10.1007/s11244-022-01601-w⟩. ⟨hal-03650572⟩

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Cyanobacterial formation of intracellular Ca-carbonates in undersaturated solutions

Nithavong Cam, Karim Benzerara, Thomas Georgelin, Maguy Jaber, Jean-François Lambert, Mélanie Poinsot, Fériel Skouri-Panet, David Moreira, Purificacion Lopez-Garcia, Emmanuelle Raimbault, Laure Cordier, Didier Jezequel

Cyanobacteria have long been thought to induce the formation of Ca-carbonates as secondary by-products of their metabolic activity, by shifting the chemical composition of their extracellular environment to conditions favoring mineral precipitation. Some cyanobacterial species forming Ca-carbonates…

Geobiology, 2018, 16 (1), pp.49-61. ⟨10.1111/gbi.12261⟩. ⟨hal-01655173⟩

• Autre publication scientifique

Carbon nitride boosts the CO2 methanation activity of Ni/CeO2

Yingrui Zhao, Plaifa Hongmanorom, Feilong Yang, Sandra Casale, Capucine Sassoye, Ales Styskalik, Damien Debecker

Selective CO2 methanation using green H2 offers a promising approach for tackling both energy and environ- mental challenges. Herein, a Ni/CeO2 catalyst was synthesized using a one-pot method in the presence of sacrificial C3N4 and evaluated for CO₂ methanation. The catalyst exhibited a high CO2…

2025, pp.119153. ⟨10.1016/j.jece.2025.119153⟩. ⟨hal-05482301⟩

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Investigating nalidixic acid adsorption onto ferrihydrite and maghemite surfaces: molecular-level insights <i>via</i> continuous-flow ATR-FTIR spectroscopy

Ana C Schuh Frantz, Alberto Mezzetti, Ari Paavo Seitsonen, Sylvie Nelieu, Etienne Balan, Guillaume Morin, Xavier Carrier

Contaminants sequestration by iron oxides are of particular relevance in environmental chemistry and Fourier Transform Infrared (FTIR) Spectroscopy in Attenuated Total Reflectance (ATR) mode is used in this study to investigate the molecular-scale adsorption mechanism of the antibiotic nalidixic…

• Autre publication scientifique

Spark ablation: a dry, physical, and continuous method to prepare powdery metal nanoparticle-based catalysts

Damien Debecker, Plaifa Hongmanorom, Tobias Pfeiffer, Bernardus Zijlstra, Yingrui Zhao, Sandra Casale, Capucine Sassoye

We report the first synthesis of a powdery heterogeneous catalyst using spark ablation technology. A TiO 2 powder is aerosolized in a vortex and injected close to the electrode of a spark ablation nanoparticle generator, to be decorated with Ni nanoparticles. The resulting Ni/TiO2 catalyst is…

2024, pp.11076-11079. ⟨10.1039/d4cc03469d⟩. ⟨hal-05482360⟩

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What Do Tantalum Framework Sites Look Like in Zeolites? A Combined Theoretical and Experimental Investigation

Frederik Tielens, Tetsuya Shishido, Stanislaw Dzwigaj

Ab initio periodic DFT calculations on the structural and energy properties of different model tantalum framework sites in tantalum-substituted socialite cavities are presented and related to experimental FTIR measurements on Ta-containing SiBEA zeolites. The tantalum framework sites are…

Journal of Physical Chemistry C, 2010, 114 (21), pp.9923-9930. ⟨10.1021/jp102181m⟩. ⟨hal-00604808⟩