• Article dans une revue

Phase selective synthesis of nickel silicide nanocrystals in molten salts for electrocatalysis of the oxygen evolution reaction

Ram Kumar, Mounib Bahri, Yang Song, Francisco Gonell, Cyril Thomas, Ovidiu Ersen, Clément Sanchez, Christel Laberty-Robert, David Portehault

We report phase selective synthesis of intermetallic nickel silicide nanocrystals in inorganic molten salts. NiSi and Ni2Si nanocrystals are obtained by reacting a nickel (II) salt and sodium silicide Na4Si4 in the molten LiI-KI inorganic eutectic salt mixture. We report that nickel silicide…

Nanoscale, 2020, 12 (28), pp.15209-15213. ⟨10.1039/D0NR04284F⟩. ⟨hal-02923099⟩

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Magnetic Traits in CoO‐Core@CoFe 2 O 4 ‐shell Like Nanoparticles

Nancy Flores-Martinez, Margot Roemer, Sarra Gam-Derouich, Patricia Beaunier, David Habrovsky, Souad Ammar

Antiferromagnetic (AF) CoO pseudo-single crystals 125±20 nm in diameter were prepared by forced hydrolysis in polyol and used as seeds to grow a poly- and nano-crystalline (5 nm in diameter) ferrimagnetic (F) CoFe2O4 shell. Transmission electron microscopy (TEM) showed a certain epitaxy between the…

ChemNanoMat, 2019, 5 (4), pp.514-524. ⟨10.1002/cnma.201800544⟩. ⟨hal-04022347⟩

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Multiple-Cell Microfluidic Dielectric Resonator for Liquid Sensing Applications

Ala Eldin Omer, George Shaker, Safieddin Safavi-Naeini, Kieu Ngo, Raed M Shubair, Georges Alquié, Frédérique Deshours, Hamid Kokabi

This paper presents a high-sensitive planar microwave sensor based on the metamaterial technology, integrated with a microfluidic channel to be used for liquid sensing in a variety of biomedical applications. The sensor design comprises three cells of circular complementary split ring resonators (…

IEEE Sensors Journal, 2021, 21 (5), pp.6094-6104. ⟨10.1109/JSEN.2020.3041700⟩. ⟨hal-03597238⟩

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Ionic liquid redox flow membraneless battery in microfluidic system

Nesrine Chaabene, Kieu Ngo, Mireille Turmine, Vincent Vivier

Redox flow batteries (RFBs) often require the presence of a physical membrane to separate the two compartments of the battery. The objective of this work is to develop a membraneless microfluidic redox flow battery (RFB) by using 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (…

Journal of Energy Storage, 2023, 57, pp.106270. ⟨10.1016/j.est.2022.106270⟩. ⟨hal-04775517⟩

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Physico-chemical properties of FeAlBEA and FeSiBEA zeolites and their catalytic activity in the SCR of NO with ethanol or methane

Janusz Janas, Stanislaw Dzwigaj

FeAlBEA and FeSiBEA zeolites are prepared by a conventional ion exchange and a two-step postsynthesis method, respectively. Their physico-chemical properties are investigated by XRD, FTIR, and diffuse reflectance UV-vis. For FeAlBEA zeolite, framework tetrahedral Fe(III), extra-framework octahedral…

Catalysis Today, 2011, 176 (1), pp.272-276. ⟨10.1016/j.cattod.2010.12.012⟩. ⟨hal-00666884⟩

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Adsorption properties of Fe-containing dealuminated BEA zeolites as revealed by FTIR spectroscopy

Konstantin Hadjiivanov, Elena Ivanova, Radoslav Kefirov, Janusz Janas, Anna Plesniar, Stanislaw Dzwigaj, Michel Che

Adsorption properties of Fe-containing dealuminated BEA zeolites were investigated by FTIR spectroscopy of adsorbed CO and NO. Two Fe-containing SiBEA zeolite samples were prepared by a two-step post-synthesis method: creation of vacant T-atom sites (T = Si, Al) by dealumination of…

Microporous and Mesoporous Materials, 2010, 131 (1-3), pp.1-12. ⟨10.1016/j.micromeso.2009.11.034⟩. ⟨hal-00604721⟩

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Evidence of Pd segregation and stabilization at edges of AuPd nano-clusters in the presence of CO: A combined DFT and DRIFTS study

Beien Zhu, Gode Thrimurthulu, Laurent Delannoy, Catherine Louis, Christine Mottet, Jerome Creuze, Bernard Legrand, Hazar Guesmi

Combined Density Functional Theory (DFT) calculations and Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) were performed to study the distribution of Pd atoms in bimetallic AuPd nanoparticles in the presence of adsorbed CO. Compared to vacuum condition, the results showed…

Journal of Catalysis, 2013, 308, pp.272-281. ⟨10.1016/j.jcat.2013.08.022⟩. ⟨hal-03184658⟩

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Integrated stopped-flow device for the study of porous materials using hyperpolarized $^{129}$Xe NMR

Jing Li, Estelle Léonce, Corentin Coutellier, Céline Boutin, Kévin Chighine, Charles Rivron, Anne Davidson, Patrick Berthault

A simple, low-cost, and efficient device is proposed for the study of porous materials via NMR using small gas probes. Mainly built through additive manufacturing and being equipped with a radiofrequency solenoid microcoil, it only requires tiny quantities of sample and/or gas and is particularly…

Analytical Chemistry, 2024, ⟨10.1021/acs.analchem.4c00490⟩. ⟨cea-04596570⟩

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Halide Ligands to Release Strain in Cadmium Chalcogenide Nanoplatelets and Achieve High Brightness

Marion Dufour, Junling Qu, Charlie Gréboval, Christophe Méthivier, Emmanuel Lhuillier, Sandrine Ithurria

Zinc blende II-VI semiconductor nanoplatelets (NPLs) are defined at the atomic scale along the thickness of the nanoparticle and are initially capped with carboxylates on the top and bottom [001] facets. These ligands are exchanged on CdSe NPLs with halides that act as X-L-type ligands. These CdSe…

ACS Nano, 2019, ⟨10.1021/acsnano.8b09794⟩. ⟨hal-02099454⟩

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When RNA meets montmorillonite: Influence of the pH and divalent cations

Luís de Oliveira, Pollyana Trigueiro, Baptiste Rigaud, Edson da Silva-Filho, Josy Osajima, Maria Fonseca, Jean-François Lambert, Thomas Georgelin, Maguy Jaber

Applied Clay Science, 2021, 214, pp.106234. ⟨10.1016/j.clay.2021.106234⟩. ⟨hal-03990019⟩