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Solid base catalysts obtained from hydrotalcite precursors, for Knoevenagel synthesis of cinamic acid and coumarin derivatives

E. Angelescu, Octavian Dumitriu Pavel, Ruxandra Bırjega, Rodica Zavoianu, Guylène Costentin, Michel Che

The goal of this paper was to study the synthesis of the cinamic acid, coumarin-3-carboxilic acid and their ethylesters by Knoevenagel condensation using the solid base catalysts obtained from calcined Mg–Al, Mg–Al + Ln (Ln = Dy, Gd) and Li–Al hydrotalcites, under solvent free conditions.…

Applied Catalysis A: General, 2006, 308, pp.13-18. ⟨10.1016/j.apcata.2006.04.011⟩. ⟨hal-00112131⟩

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A TEM and UV-visible study of silver reduction by ethanol in Ag-alumina catalysts

Elie Sayah, Dalil Brouri, Yiaho Wu, Andrea Musa, Patrick da Costa, Pascale Massiani

A transmission electron microscopy (TEM) study dedicated to the understanding of dispersion and location of Ag nanospecies in silver-alumina catalysts is reported. A special attention is put on the conditions of powder catalyst deposition on the grids for TEM analysis. When the deposition is…

Applied Catalysis A: General, 2011, 406, pp.94-101. ⟨10.1016/j.apcata.2011.08.016⟩. ⟨hal-00668908⟩

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CO- and N2-FTIR Characterisation of Oxidised Rhodium Species Supported on Ce0.68Zr0.32O2

Céline Fontaine-Gautrelet, Jean-Marc Krafft, Olivier Gorce, Françoise Villain, Gérald Djéga-Mariadassou, Cyril Thomas

The identification of Rh oxidised species of a Rh(0.29)/Ce0.68Zr0.32O2 catalyst, exhibiting peculiar CO-O2 kinetics [Manuel et al., J. Catal. 2004, 224, 269], is addressed. For this purpose, various catalysts are studied by XANES, CO- and N2-FTIR, and benzene hydrogenation. The results obtained,…

Physical Chemistry Chemical Physics, 2006, 8, pp.3732-3740. ⟨10.1039/b601926a⟩. ⟨hal-00091039⟩

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Boosting CO2 reforming of methane via the metal-support interaction in mesostructured SBA-16-derived Ni nanoparticles

Chao Sun, Paulina Summa, Ye Wang, Katarzyna Świrk, Albert Miró I Rovira, Sandra Casale, Konrad Świerczek, Changwei Hu, Magnus Rønning, Patrick da Costa

High surface area and porosity SBA-16 was synthesized and used as support for Ni nanoparticles using three methods including wet impregnation, citric acid-assisted impregnation, and ammonia evaporation. All the studied samples showed high activity in the CO2 reforming of methane reaction, however,…

Applied Materials Today, 2022, 26, pp.101354. ⟨10.1016/j.apmt.2021.101354⟩. ⟨hal-04030144⟩

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Antibacterial surfaces developed from bio-inspired approaches

K. Glinel, P. Thébault, Vincent Humblot, Claire-Marie Pradier, T. Jouenne

Prevention of bacterial adhesion and biofilm formation on the surfaces of materials is a topic of major medical and societal importance. Various synthetic approaches based on immobilization or release of bactericidal substances such as metal derivatives, polyammonium salts and antibiotics were…

Acta Biomaterialia, 2012, 8, pp.1670-1684. ⟨10.1016/j.actbio.2012.01.011⟩. ⟨hal-00689996⟩

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Real time monitoring of the evolution of Ni2+ environment in faujasite upon rehydration by in situ dispersive-EXAFS.

Jean-François Groust, Catherine Pommier, Lorenzo Stievano, François Villain, Christine Giorgetti, François Baudelet, Pascale Massiani

The evolution of both oxygen and framework tetrahedral shells around Ni2+ cations in faujasite upon rehydration can be described in real time thanks to in situ dispersive-EXAFS. Such type of analysis permits precise experimental description of the coordination environment of cations in zeolite…

Catalysis Letters, 2005, 102, pp.257-260. ⟨10.1007/s10562-005-5865-3⟩. ⟨hal-00020239⟩

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Characterization of Mo2C-WO2 composite catalysts for bifunctional isomerization: a new pulse method to quantify acid sites

Claude Potvin, Anne-Félicie Lamic Chae-Ho Shin Gérald Djega-Mariadassou Claude Potvin

Applied Catalysis A: General, 2006, 302, pp.5. ⟨10.1016/j.apcata.2005.12.006⟩. ⟨hal-00022217⟩

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Kinetic study of the hydrodesulfurization of dibenzothiophene over molybdenum carbides supported on functionalized carbon black composite Influence of indole

A. Hynaux, Celine Sayag, S. Suppan, J. Trawczynski, M. H. Lewandowski, A. Szymanska-Kolasa, G. Djéga-Mariadassou

Different carbon black composite (CBC) supported molybdenum carbides were synthesized. The support was functionalized with nitric acid at different pH of the impregnation solution (pH 5.2; 0), in order to improve the active phase dispersion. After characterization of these supported catalysts, the…

Applied Catalysis B: Environmental, 2006, 72, pp.62-70. ⟨10.1016/j.apcatb.2006.09.019⟩. ⟨hal-00128025⟩

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Evidence for Rh electron-deficient atoms (Rhdelta+) as the catalytic species for CO oxidation when supported on Ce0.68Zr0.32O2: a combined N2-FTIR, benzene hydrogenation and kinetic study

Céline Fontaine-Gautrelet, Jean-Marc Krafft, Gérald Djéga-Mariadassou, Cyril Thomas

The characterization of two low-loaded Rh(wt%)/Ce0.68Zr0.32O2 samples (Rh(0.29)/CZ and Rh(0.32)/CZ) was performed via N2-FTIR and benzene hydrogenation before being investigated for CO oxidation activity and kinetics. N2-FTIR allows characterization of both RhΔ+ (νN2 = 2295 cm-1) and Rh0 (νN2 =…

Journal of Catalysis, 2007, 247, pp.34-42. ⟨10.1016/j.jcat.2007.01.005⟩. ⟨hal-00157019⟩

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Platinum Doped Hydrotreating Catalysts for Deep Hydrodesulfurization of Diesel Fuels

Stéphanie Pessayre, Christophe Geantet, Robert Bacaud, Michel Vrinat, Thanh Son N'Guyen, Yvonne Soldo, Jean-Louis Hazemann, Michèle Breysse

Two-stage processes are possible solutions for reaching 10 ppm sulfur in gas oil without severe running conditions. First, most of the sulfur is removed by using a CoMo conventional catalyst. Second, after H2S removal, the treated oil, with a remaining S content below 500 ppm, is again hydrotreated…

Industrial and engineering chemistry research, 2007, 46 (12), pp. 3877-3883. ⟨10.1021/ie060932x⟩. ⟨hal-00333732⟩