• Article dans une revue

A comparative in situ TEM and UV-visible spectroscopic study of the thermal evolution of Ag species dispersed on Al2O3 and NaX zeolite supports

Elie Sayah, Dalil Brouri, Pascale Massiani

The oxidation states and dispersion of silver supported on alumina and faujasite were monitored by TEM, TPR and in situ UV-visible spectroscopy along the steps of thermal dehydration, then oxidation and finally reduction of the freshly prepared materials. An original transmission electron…

Catalysis Today, 2013, 218-219, pp.10-17. ⟨10.1016/j.cattod.2013.06.003⟩. ⟨hal-00958109⟩

• Article dans une revue

Selectivity in the gas-phase hydrogenation of 4-nitrobenzaldehyde over supported Au catalysts

Noémie Perret, Xiaodong Wang, Thomas Onfroy, Christophe Calers, Mark A Keane

The effects of Au particle size and support properties have been examined in the gas-phase hydrogenation of 4-nitrobenzaldehyde over Au/ZrO2, Au/TiO2 and Au/Al2O3. Gold particle size was varied using deposition-precipitation and impregnation syntheses. The catalysts have been characterised in terms…

Journal of Catalysis, 2014, 309, pp.333-342. ⟨10.1016/j.jcat.2013.10.011⟩. ⟨hal-00982883⟩

• Article dans une revue

Comprehensive study on the effect of magnesium loading over Nickel-ordered mesoporous alumina for dry reforming of methane

Leila Karam, Marco Armandi, Sandra Casale, Vanessa El Khoury, Barbara Bonelli, Pascale Massiani, Nissrine El Hassan

A comprehensive study of the effect of Mg loading on the performances in Dry Reforming of Methane of a series of mesoporous Ni 6-Mg x-Al 2 O 3 catalysts containing 6 wt% Ni and 0 to 26 wt% Mg is presented. Complementary characterizations by N 2 sorption, XRD, SEM/TEM, FT-IR, H 2-TPR and H 2-TPD of…

Energy Conversion and Management, 2020, 225, ⟨10.1016/j.enconman.2020.113470⟩. ⟨hal-03053832⟩

• Article dans une revue

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⟩

• Poster de conférence

Bimetallic Fe-Ni/SiO2 catalysts for furfural hydrogenation: respective roles of Fe and Ni

Dichao Shi, Jean-Sébastien Girardon, Anne Constant, Anne-Sophie Mamede, Robert Wojcieszak, Paul Sébastien, E. Marceau, Anne-Félicie Lamic-Humblot, Maya Marinova, Valérie Briois, Lorenzo Stievano

ISGC 2019, International Symposium on Green Chemistry, May 2019, La Rochelle, France. ⟨hal-03515379⟩

• Article dans une revue

Two- and Four-Electrode Configurations for Contactless Reinforced Concrete Corrosion Monitoring

B. Díaz, X.R. Nóvoa, C. Pérez, A. Pintos, Vincent Vivier

The paper addresses the need for a fast and reliable method for field monitoring reinforced concrete structures. A proof of concept is presented where a noncontact procedure provides quantitative information on the concrete resistivity and reinforcement corrosion rate. A Wenner-type probe is…

Corrosion, 2022, 79 (4), pp.419-425. ⟨10.5006/4200⟩. ⟨hal-04294196⟩

• Article dans une revue

Optimization of ammonium fluoride route to hierarchical ZSM-5 zeolites

T. Onfroy, Z. Qin, S. Casale, V. Valtchev

Preparation of hierarchical zeolites via a chemical etching is a hot topic as it strongly improves microporous material's diffusive properties and thus their catalytic activity. However, an issue that is often neglected is the softening the post-treatment condition. Herein we we report the…

Microporous and Mesoporous Materials, 2023, 362, pp.112760. ⟨10.1016/j.micromeso.2023.112760⟩. ⟨hal-04229106⟩

• Article dans une revue

How the acido-basic properties of Mg silicates and clays govern the catalytic mechanism of transesterification reactions

Longfei Lin, Elisa Silva Gomes, François Payan, Maguy Jaber, Jean-Marc Krafft, Guillaume Laugel, Hélène Lauron-Pernot

Choosing acido-basic properties of magnesium silicates to tune the transesterification mechanism in the liquid phase.

Catalysis Science & Technology, 2019, 9 (21), pp.6072-6084. ⟨10.1039/C9CY01475F⟩. ⟨hal-03990037⟩

• Article dans une revue

Generation of pits on CoCrFeMnNi high entropy alloy: an electrochemical impedance study of a single event

Yaojun Hou, Oumaïma Gharbi, Kevin Ogle, Fan Sun, Mireille Turmine, Vincent Vivier

In this study, a single pit was successfully generated on the surface of a CoCrFeMnNi alloy using a home-made device consisting of an electrochemical work station coupled with a microflow-cell. The three-dimensional morphology of the single pit was observed by optical microscopy, revealing that the…

Electrochimica Acta, 2025, 526, pp.146193. ⟨10.1016/j.electacta.2025.146193⟩. ⟨hal-05041648⟩

• Article dans une revue

Identification of iron species in FeSiBEA by DR UV-vis, XPS and Mössbauer spectroscopy: Influence of Fe content

J. Gurgul, K. Łątka, I. Hnat, J. Rynkowski, S. Dzwigaj

The nature of iron in FeSiBEA zeolite was identified using DR UV-vis, XPS and Mössbauer spectroscopy. Various FexSiBEA zeolites (x = 3.8, 8.2 and 15 wt.%) were prepared by a two-step post synthesis method, which consisted in the creation of vacant T-atom sites by dealumination of tetraethylammonium…

Microporous and Mesoporous Materials, 2013, 168, pp.1-6. ⟨10.1016/j.micromeso.2012.09.015⟩. ⟨hal-00812092⟩