• Article dans une revue

Activation of C‐H Bond of Propane by Strong Basic Sites Generated by Bulk Proton Conduction on V‐Modified Hydroxyapatites for the Formation of Propene

Sarah Petit, Cyril Thomas, Yannick Millot, Jean-Marc Krafft, Christel Laberty-Robert, Guylène Costentin

Insights into the catalytic transformation of propane to propene on V‐apatites catalysts are provided based on structure‐reactivity relationships. Substitution of phosphates by vanadates in the hydroxyapatite structure leads to the formation of Ca10(PO4)6‐x(VO4)x(OH)2‐yOy V‐oxy‐hydroxy‐apatite…

ChemCatChem, In press, ⟨10.1002/cctc.201902181⟩. ⟨hal-02503822⟩

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One Step up the Ladder of Prebiotic Complexity: Formation of Nonrandom Linear Polypeptides from Binary Systems of Amino Acids on Silica

Yuriy Sakhno, Alice Battistella, Alberto Mezzetti, Maguy Jaber, Thomas Georgelin, Laurent Michot, Jean-François Lambert

Evidence for the formation of linear oligopeptides with nonrandom sequences from mixtures of amino acids coadsorbed on silica and submitted to a simple thermal activation is presented. The amino acid couples (glutamic acid+leucine) and (aspartic acid+valine) were deposited on a fumed silica and…

Chemistry - A European Journal, 2019, 25 (5), pp.1275-1285. ⟨10.1002/chem.201803845⟩. ⟨hal-02067461⟩

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Facile synthesis of palladium nanowires by a soft templating method

Prem Siril, Anaïs Lehoux, Laurence Ramos, Patricia Beaunier, Hynd Remita

Very long and thin monocrystalline Pd nanowires were synthesized by decomposition using hydrazine vapour treatment of Pd2(DBA)3 confined in the oil phase of a hexagonal mesophase. The mesophase is composed of toluene-swollen tubes, doped with the Pd precursor, stabilized by a monolayer of…

New Journal of Chemistry, 2012, 36 (10), pp.2135. ⟨10.1039/c2nj40342k⟩. ⟨hal-00760633⟩

• Article dans une revue

Triple structuration and enhanced corrosion performance of 316L in Laser-Powder Bed Fusion

Alexis Fouchereau, Hicham Maskrot, Fernando Lomello, Sophie Bosonnet, Oumaïma Gharbi, Benoit Gwinner, Pierre Laghoutaris, Frédéric Schuster, Vincent Vivier, Beatriz Puga

This work focuses on the influence of the feedstock powders on the microstructural properties and corrosion behavior of 316L stainless steel (SS) produced by laser powder bed fusion (L-PBF) from two different suppliers. Microstructural investigations conducted after additive manufacturing reveal…

Corrosion Science, 2024, 228, pp.111830. ⟨10.1016/j.corsci.2024.111830⟩. ⟨cea-04602059⟩

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IR Operando Study of the Acetylene Effect on the NO Reduction Mechanism on Pd–Rh/CeO2–ZrO2 Three-Way Catalyst

T. Onfroy, O. Marie

Topics in Catalysis, 2019, 62, pp.336-344. ⟨10.1007/s11244-018-1092-1⟩. ⟨hal-02019086⟩

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Design of model tokamak particles for future toxicity studies: Morphology and physical characterization

E. Bernard, F. Jambon, I. Georges, M. Sanles Sobrido, Jérôme Rose, N. Herlin-Boime, F. Miserque, P. Beaunier, D. Vrel, S. Dine, E. Hodille, J. Chêne, S. Garcia-Argote, G. Pieters, S. Peillon, F. Gensdarmes, G. Dinescu, T. Acsente, C. Uboldi, T. Orsiere, Veronique Malard, B. Rousseau, G. Dine, Ph. Delaporte, C Grisolia

During ITER operation, it is expected that the large panel of plasma-wall interactions triggers the production of dust particles from the tungsten and beryllium first wall. These particles can be loaded with tritium (T) used as a fuel for the fusion reaction; T inventory is of prime importance for…

Fusion Engineering and Design, 2019, 145, pp.60-65. ⟨10.1016/j.fusengdes.2019.05.037⟩. ⟨hal-02169319⟩

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The state of BEA zeolite supported nickel catalysts in CO2 methanation reaction

Wojciech Gac, Witold Zawadzki, Grzegorz Słowik, Marcin Kuśmierz, Stanislaw Dzwigaj

Two model nickel catalysts for CO2 methanation reaction were prepared by the impregnation method using unmodified and dealuminated BEA-type zeolite supports, denoted NiHAlBEA and NiSiBEA. Transmission electron microscopy (TEM) and X-ray diffraction studies evidenced formation of metallic nickel…

Applied Surface Science, 2021, 564, pp.150421. ⟨10.1016/j.apsusc.2021.150421⟩. ⟨hal-03360250⟩

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Unraveling the Direct Decomposition of NO x over Keggin Heteropolyacids and Their Deactivation Using a Combination of Gas-IR/MS and In Situ DRIFT Spectroscopy

Josefine Schnee, Laurent Delannoy, Guylène Costentin, Cyril Thomas

Keggin heteropolyacids (HPAs) have been known to be efficient NOx absorbers for many years, and to decompose a significant fraction of the NOx species pre-absorbed at 100-150 °C into harmless N2 and O2 upon rapid heating to 450 °C. However, this capability of Keggin HPAs to directly decompose NOx…

Journal of Physical Chemistry C, In press, ⟨10.1021/acs.jpcc.0c05945⟩. ⟨hal-02960399⟩

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Synthesis of Well-Defined Dawson-Type Poly(N,N-diethylacrylamide) Organopolyoxometalates

Jennifer Lesage de la haye, Patricia Beaunier, Laurent Ruhlmann, Bernold Hasenknopf, Emmanuel Lacôte, Jutta Rieger

An organotin-substituted Dawson-type phosphotungstate was covalently linked to a trithiocarbonate group by postfunctionalization methods. This organopolyoxometalate led to a series of polyoxometalate (POM)–poly(N,N-diethylacrylamide) hybrids in a controlled way through reversible addition–…

ChemPlusChem, 2014, 79 (2), pp.250-256. ⟨10.1002/cplu.201300346⟩. ⟨hal-01121569⟩

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Design of TiO2/Au nanoparticle films with controlled crack formation and different architectures using a centrifugal strategy

Abdelhafed Taleb, Frederic Mesguich, Thomas Onfroy, Xue Yanpeng

Here we present an approach to design hybrid nanocomposite films based on TiO2/Au nanoparticles using centrifugation processes. The prepared nanocomposite films have been characterized by different techniques such as FEGSEM, TEM, BET and XRD. Furthermore it is demonstrated that centrifugal force…

RSC Advances, 2015, 5 (10), pp.7007-7017. ⟨10.1039/C4RA13829E⟩. ⟨hal-01121614⟩