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13. ToF-SIMS and XPS characterizations of model fission products (I, Cs) deposits after thermal treatment simulating late phase conditions of a nuclear power plant severe accident

Author

Le Fessant Elouan, Gregoire Anne-Cécile, Nuns Nicolas, Simon Pardis, Mamede Anne-Sophie, Paul Jean-François, and Cantrel Laurent

Subjects
xps, tof-sims, revaporization, csi, Physics, QC1-999
Abstract

During a Severe Accident (SA) occurring in a nuclear power plant, many Fission Products (FP) are released from the degraded fuel and are transported in the Reactor Coolant System (RCS). Depending on their volatility, FP can be either deposited on the surface of the Reactor Coolant System (RCS) or transported into the containment building from where they may be released into the environment in case of early containment failure. This was the case for the Fukushima Daiichi (FD) accident with important FP releases which were observed following the containment vessel failure which lasted up to several weeks after the accident. If early phase releases were well predicted by SA simulation codes, delayed releases were not correctly predicted [1]. Such discrepancies can be attributed to the revaporization of deposits inside the RCS which were not yet modeled in the SA simulation tools. Previous experiments over the past 20 years evidenced the possible formation and revaporization of CsI [2]. However, up to now, no clear CsI revaporization mechanism has been determined. In order to propose a mechanism, this study (scheduled within the OECD/NEA/ESTER project) aims at determining the speciation of each species remaining on the substrate after revaporization tests under different conditions using XPS and ToF-SIMS (X-ray Photoelectron Spectroscopy and Time of Flight Secondary Ion Mass Spectrometry. These two combined techniques allow the identification of the main species of the residue leading to the proposition of two revaporization reactions.

Published
2022
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22. Evolution of Ni-Fe nanoparticles upon oxidation-reduction and catalytic reaction: an advanced characterization study

Author

Marceau, Eric, Shi, D., Sadier, Achraf, Wojcieszak, Robert, Paul, Sébastien, Girardon, Jean-Sébastien, Mamede, Anne-Sophie, Marinova, Maya, Stievano, L., Sougrati, M. T., La Fontaine, C., Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut Michel Eugène Chevreul - FR 2638 (IMEC), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
[CHIM]Chemical Sciences
Abstract

International audience

Published
2022

25. Ni(0) Ex‐Phyllosilicates as Efficient and Stable Low Temperature CH4 Dry Reforming Catalyst.

Author

Ciotonea, Carmen, Wei, Yaqian, Ungureanu, Adrian, Catrinescu, Cezar, Gardol, Olivier, Mamede, Anne‐Sophie, Dumeignil, Franck, Paul, Sébastien, Jalowiecki‐Duhamel, Louise, and Royer, Sébastien

Subjects
LOW temperatures, POROUS silica, CATALYSTS, HYDROGEN production, METHANE, MESOPOROUS silica
Abstract

This study explores the performances of nickel‐based materials for the dry reforming of methane (DRM), an important process for hydrogen and syngas productions. Ni nanoparticles are issued from porous phyllosilicate phase exolution under reducing conditions (in situ or ex situ). Phyllosilicate precursors were obtained by deposition/precipitation with urea onto SBA‐15 porous silica, with metal loading up to 40 wt.%. Reaction was performed at 600–700 °C. The successful formation and stabilization of highly dispersed nanoparticles (2–6 nm) is revealed, even for highly loaded formulations (20 wt.% and 40 wt.%). In DRM‐700 (CH4/CO2=1, 20 % CH4, 480,000 mL gcat−1 h−1) the formulation at 20 wt.% metal loading (Ni_20 %) activated during reaction affords 50 % and 65 % of CH4 and CO2 conversions respectively at 700 °C. Ni_20 % is showing excellent resistance toward sintering after DRM stability test of 80 h. Characterizations made for spent catalyst show high resistance toward sintering and limited carbon formation. [ABSTRACT FROM AUTHOR]

Published
2023
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28. Probing the Core and Surface Composition of Base-Metal Nanoalloys to Rationalize their Selectivity: The Case of Ni-Fe/SiO 2 Catalysts for the Liquid-Phase Hydrogenation of Furfural

Author

Shi, Dichao, Sadier, Achraf, Girardon, Jean-Sébastien, Mamede, Anne-Sophie, Ciotonea, Carmen, Marinova, Maya, Stievano, Lorenzo, Sougrati, Moulay, La Fontaine, Camille, Paul, Sébastien, Wojcieszak, Robert, Marceau, Eric, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Université de Montpellier (UM), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), and ANR-17-CE07-0022,NobleFreeCat,Nanoparticules bimétalliques sans métal noble pour l'hydrogénation des sucres(2017)

Subjects
selectivity, core-shell structure, bimetallic catalysts, LEIS, furfural, [CHIM.CATA]Chemical Sciences/Catalysis, furfuryl alcohol
Abstract

International audience; Bimetallic catalysis for conversion of bio-sourced molecules has often relied on noble metals that should be replaced in the near future by the association of cheaper and more abundant base metals, also known by a poor Z-contrast, which makes in-depth characterization of these systems challenging. However, determining the distribution of base metals in bimetallic nanoparticles is of paramount importance if one wants to rationalize their selectivity. Besides demonstrating that, despite their oxidable character, Ni-Fe catalysts are stable systems for liquid-phase hydroconversion of furfural, this study demonstrates that heterogeneities in the structure of reduced Ni-Fe nanoparticles are key to understanding their catalytic properties, provides a characterization methodology to discriminate between their surface and core compositions, and determines an adequate balance between the two metals that allows tuning the relative rates of the various reaction pathways and, thus, the selectivity.

Published
2022
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29. Applications des techniques d'analyse de surface XPS/ LEIS / ToF-SIMS

Author

Mamede, Anne-Sophie, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis, ComputingMilieux_MISCELLANEOUS
Abstract

National audience

Published
2021

30. Mn- or Cu- substituted LaFeO3-based three-way catalysts: Highlighting different catalytically operating modes of La0.67Fe0.8M0.2O3 (M=Cu, Mn)

Author

Nandi, Shreya, primary, Wu, Jiang Xiang, additional, Simon, Pardis, additional, Nuns, Nicolas, additional, Trentesaux, Martine, additional, Tougerti, Asma, additional, Fonda, Emiliano, additional, Girardon, Jean-Sébastien, additional, Paul, Jean-François, additional, Mamede, Anne-Sophie, additional, and Berrier, Elise, additional

Published
2021
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32. Development of Fe-Ni/SiO2 bimetallic catalysts for furfural hydrogenation using a high-throughput screening approach

Author

Shi, D., Mamede, Anne-Sophie, Wojcieszak, Robert, Marinova, Maya, Paul, Sébastien, Marceau, Eric, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut Michel Eugène Chevreul - FR 2638 (IMEC), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
[CHIM]Chemical Sciences
Abstract

International audience

Published
2021

33. Influence de la teneur en strontium sur les performances des électrodes composites Bi1.5Er0.5O3/La1-xSrxMnO3 pour SOFC basse température

Author

Duffort, Victor, Pajot, Martin, Mountadir, Soukaina, Capoen, Edouard, Mamede, Anne-Sophie, Vannier, Rose-Noelle, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), ANR-18-CE05-0001,BIBELOTS,SOFC basse température à base d'oxyde de bismuth(2018), Université de Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181, and Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.INOR]Chemical Sciences/Inorganic chemistry
Abstract

National audience; Les piles à oxyde solide haute température (HT-SOFC) sont généralement composées d’une cathode composite La0.8Sr0.2MnO3 (LSM)/YSZ, d’un électrolyte à base de zircone stabilisée à l’yttrium (YSZ) et d’un cermet nickel/YSZ à l’anode. En raison de la conductivité limitée de la zircone stabilisée, des températures de fonctionnement élevées (> 700 °C) sont nécessaires pour atteindre la mobilité ionique requise. Les difficultés d’élaboration de ces dispositifs sont à l’origine des efforts développés pour abaisser la température de fonctionnement. Le remplacement d’YSZ par de l’oxyde de bismuth stabilisé à l’erbium (ESB) dans le compartiment cathodique et par de la cérine stabilisée (GDC) dans le compartiment anodique, deux matériaux présentant des conductions ioniques bien supérieures à YSZ, a permis d’obtenir des gains de performances importants, atteignant des densités de puissance de ~1 W cm-2 à 650 °C [1]. A la suite de ces travaux, plusieurs groupes ont cherché à améliorer ce type de SOFC en optimisant la microstructure ou la fabrication de la cathode mais en gardant la composition utilisée pour les piles à combustible classiques, La0.8Sr0.2MnO3 [2]. Dans ce travail, nous nous intéressons au rôle de la teneur en strontium dans La1‑xSrxMnO3 sur la résistance spécifique de surface (ASR) d’électrodes composites LSM/ESB. Les compositions x = 0.15, 0.3, 0.4, 0.5, 0.6, 0.8 ont été évaluées pour déterminer l’influence de la structure, des propriétés de transport électronique ou encore du rapport Mn3+/4+. En utilisant la diffraction des rayons X, l’analyse thermogravimétrique et la spectroscopie de diffusion des ions de basse énergie (LEIS), nous avons démontré que, contrairement à ce qui est observé à haute température où la ségrégation de l’oxyde de strontium à la surface des électrodes est le processus de désactivation principal, à plus basse température, c’est l’oxydation de surface de LSM qui limite la dissociation de l’oxygène. L’activité catalytique des cathodes a été évaluée par spectroscopie d’impédance sur des cellules symétriques avec un électrolyte d’ESB. Nous avons ainsi pu mettre en évidence à 500 °C, par rapport à la composition classiquement utilisée, une diminution d’un facteur 2 de la résistance spécifique de surface avec pour composition La0.6Sr0.4MnO3, plus riche en strontium [3].RemerciementsCette étude a été menée grâce au soutien du Fonds Européen de Développement Régional (FEDER), du CNRS, de l’Université de Lille, de la Région Hauts de France, du Ministère de l'Enseignement Supérieur et de la Recherche et de l’Agence Nationale de la Recherche (BIBELOT ANR-18-CE05-0001).

Published
2021

34. Impact of the strontium content on the performance of Bi1.5Er0.5O3/La1‑xSrxMnO3 composite electrodes for low temperature SOFCs

Author

Duffort, Victor, Pajot, Martin, Mountadir, Soukaina, Capoen, Edouard, Mamede, Anne-Sophie, Vannier, Rose-Noëlle, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), ANR-18-CE05-0001,BIBELOTS,SOFC basse température à base d'oxyde de bismuth(2018), Université de Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181, and Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille

Subjects
[CHIM.INOR]Chemical Sciences/Inorganic chemistry
Abstract

International audience; Typical high temperature solid oxide fuel cells (HT-SOFC) use a La0.8Sr0.2MnO3 (LSM)/Zr1.92Y0.08O3.96 (YSZ) composite cathode on a YSZ electrolyte and a nickel/YSZ cermet anode. Due to the limited oxide conductivity of yttria stabilized zirconia, high temperatures (> 700 °C) are required in order to achieve sufficient ionic conduction. However, elevated temperatures come with significant engineering challenges motivating the long standing effort to decrease the operation temperature of SOFC. Substituting YSZ by erbium stabilized bismuth oxide (ESB) in the cathodic compartment and gadolinium doped ceria (GDC) at the anode, two much better ionic conductors, allow for a significant improvement leading to a specific power density of ~1 W cm-2 at 650 °C.1 Based on these results several groups optimized the microstructure or preparation of the cathode without changing the composition of the LSM.2 However, this stoichiometry was optimized for high temperature compatibility with YSZ and needed to be optimized as well for lower temperature.Here, we focused on the influence of the strontium content in La1-xSrxMnO3 on the area specific resistance (ASR) of composite LSM/ESB electrodes. Several compositions (x = 0.15, 0.3, 0.4, 0.5, 0.6, 0.8) were tested to investigate the influence of the structure, the electronic transport mechanism or the Mn3+/4+ ratio. Using X-ray diffraction, thermogravimetric analysis and Low Energy Ion Scattering spectroscopy (LEIS) we showed that, differently from the high temperature range, where surface segregation of SrO is the main deactivation process, at lower temperature it is the surface oxidation that inhibits the oxygen reduction efficiency of LSM. The catalytic activity of the cathodes was evaluated by Electrochemical Impedance Spectroscopy (EIS) on symmetric cells using an ESB electrolyte. We found a 2-fold decrease of the ASR at 500 °C when switching from La0.85Sr0.15MnO3, i.e. the high temperature optimized stoichiometry, to La0.6Sr0.4MnO3.3AcknowledgementsThe Fonds Européen de Développement Régional (FEDER), CNRS, Région Hauts de France, Ministère de l'Enseignement Supérieur et de la Recherche and Agence Nationale de la Recherche and BIBELOT ANR-18-CE05-0001 are acknowledged for funding.References[1]E.D. Wachsman, K.T. Lee, Science, 334 (2011), 935-939[2]J.W. Park, B.H. Yun, D.W. Joh, K.T. Lee, Electrochemical Society, 68(1) (2015), 957-96[3]M. Pajot, V. Duffort, E. Capoen, A.-S. Mamede, R.N. Vannier, J. Power Sources 450 (2020), 227649.

Published
2021

37. Mn- or Cu- substituted LaFeO 3 -based three-way catalysts: Highlighting different catalytically operating modes of La 0.67 Fe 0.8 M 0.2 O 3 (M=Cu, Mn)

Author

Nandi, Shreya, Wu, Jiang Xiang, Simon, Pardis, Nuns, Nicolas, Trentesaux, Martine, Tougerti, Asma, Fonda, Emiliano, Girardon, Jean-Sébastien, Paul, Jean-François, Mamede, Anne-Sophie, Berrier, Elise, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
Raman spectroscopy, XPS, Three-way catalysis, Operando, [CHIM.CATA]Chemical Sciences/Catalysis, Perovskite
Abstract

International audience; The present work aims at presenting our investigations on the redox behaviour of Cu-or Mndoped LaFeO 3-based perovskite powders under three-way catalysis (TWC) relevant conditions. Two distinct La-deficient catalysts of generic formula La 0.67 Fe 0.8 Mn 0.2 O 3 and La 0.67 Fe 0.8 Cu 0.2 O 3 denoted as Mn-dLFO and Cu-dLFO, respectively, were prepared based on the conventional citrate complexation route and systematically investigated using complementary characterisation techniques. This study has made it possible to highlight fundamentally different structures. In Cu-dLFO, most Cu 2+ cations are expelled from the LaFeO 3 perovskite lattice in the form of a segregated CuO phase. On the other hand, in the case of Mn-dLFO, majority of Mn 3+ cations are stabilised within the perovskite solid solution, while substantial iron exsolution in the form of an additional α-Fe 2 O 3 phase was evidenced. The evolution of both catalysts during CO-TPR using operando Raman revealed the formation of polycyclic aromatic hydrocarbons (PAHs) besides the relative structural stability of the LaFeO 3 lattice. The reduction of Mn 3+ to Mn 2+ , indirectly suggested by Raman analysis, is further supported by a quasi-in situ XPS study. The latter also evidenced the reduction of CuO to metal copper to a large extent in Cu-dLFO. In addition, a share of the α-Fe 2 O 3 phase present in Mn-dLFO is reduced to metal Fe 0 during CO oxidation, and is fully re-oxidised upon NO reduction. Our investigation thus evidences that both copper and manganese sites in Cu-dLFO and Mn-dLFO, respectively, are redox-active centres upon CO oxidation / NO reduction with, however, varying operating modes underpinned by their fundamentally different structures.

Published
2021
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38. Influence of SIC control rod material on the iodine release in case of nuclear severe accident – Chemical reactivity with fission products in thermal conditions of RCS

Author

Gregoire, Anne Cecile, Sobanska, Sophie, Tornabene, Calogero, Talaga, David, Mamede, Anne Sophie, Morin, Sandrine, Cantrel, Laurent, Laboratoire d'Expérimentation Environnement et Chimie (IRSN/PSN-RES/SEREX/L2EC), Service d'Etude et de Recherche EXpérimentale (IRSN/PSN-RES/SEREX), Institut de Radioprotection et de Sûreté Nucléaire (IRSN)-Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 (LASIRE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Service de l'Ingénierie et des Projets de Recherche (IRSN/PSN-RES/SIPR), and Institut de Radioprotection et de Sûreté Nucléaire (IRSN)

Subjects
Nuclear Energy and Engineering, [CHIM]Chemical Sciences
Abstract

International audience; The effect of Silver-Indium-Cadmiun (SIC) control rod on the transport of volatile fission products (I, Cs,Mo) in conditions of a Reactor Coolant System under NPP severe accident was investigated within threesemi-integral tests in a thermal gradient tube. The experiments addressed separately the effect of eachSIC element. Nature of transported and deposited species was investigated by ICP MS, ESEM-EDX,Raman Microspectrometry, XRD and XPS techniques.For the first time, numerous metallic molybdates involving SIC components were evidenced. The formationof such metallic molybdates competes with the formation of Cs-molybdate and may in certainconditions strongly reduce the scavenging effect of Mo towards Cs. As a result the nature of transportediodine can be strongly modified, compared to chemical systems involving only Mo, Cs and I. The dataobtained are useful to guide what species have to be added in the thermodynamic database used inthe SA simulation software.

Published
2022
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39. Characterizing the ZrC(111)/ c -ZrO 2 (111) Hetero-Ceramic Interface: First Principles DFT and Atomistic Thermodynamic Modeling.

Author

Osei-Agyemang, Eric, Paul, Jean-François, Lucas, Romain, Foucaud, Sylvie, Cristol, Sylvain, Mamede, Anne-Sophie, Nuns, Nicolas, and Addad, Ahmed

Subjects
ZIRCONIUM carbide, DENSITY of states, ELECTRONIC structure, DYNAMIC simulation, NUCLEAR reactors, AEROSPACE industries
Abstract

The mechanical and physical properties of zirconium carbide (ZrC) are limited to its ability to deteriorate in oxidizing environments. Low refractory oxides are typically formed as layers on ZrC surfaces when exposed to the slightest concentrations of oxygen. However, this carbide has a wide range of applications in nuclear reactor lines and nozzle flaps in the aerospace industry, just to name a few. To develop mechanically strong and oxygen-resistant ZrC materials, the need for studying and characterizing the oxidized layers, with emphasis on the interfacial structure between ZrC and the oxidized phases, cannot be understated. In this paper, the ZrC(111)//c-ZrO2 (111) interface was studied by both finite temperature molecular dynamic simulation and DFT. The interfacial mechanical properties were characterized by the work of adhesion which revealed a Zr|OO|Zr|OO//ZrC(111) interface model as the most stable with an oxygen layer from ZrO2 being deposited on the ZrC(111) surface. Further structural analysis at the interface showed a crack in the first ZrO2 layer at the interfacial region. Investigations of the electronic structure using the density of state calculations and Bader charge analysis revealed the interfacial properties as local effects with no significant impacts in the bulk regions of the interface slab. [ABSTRACT FROM AUTHOR]

Published
2022
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43. Como a composição química das nanopartículas bimetálicas afeta as propriedades catalíticas dos catalisadores de FeNi/SiO2?

Author

Shi, Dichao, Girardon, Jean-Sébastien, Constant, Anne, Mamede, Anne-Sophie, Wojcieszak, Robert, Sébastien, Paul, Marceau, E., Lamic-Humblot, Anne-Félicie, Marinova, Maya, Briois, Valérie, Stievano, Lorenzo, Sougrati, Moulay T., Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Michel Eugène Chevreul - FR 2638 (IMEC), Université d'Artois (UA)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

44. Identification of the interplay between Fe and Ni in bimetallic Fe-Ni/SiO2 catalysts for furfural hydrogenation

Author

Shi, Dichao, Girardon, Jean-Sébastien, Constant, Anne, Mamede, Anne-Sophie, Wojcieszak, Robert, Sébastien, Paul, Marceau, E., Lamic-Humblot, Anne-Félicie, Marinova, Maya, Briois, Valérie, Stievano, Lorenzo, Sougrati, Moulay T., Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Michel Eugène Chevreul - FR 2638 (IMEC), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

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

Author

Shi, Dichao, Girardon, Jean-Sébastien, Constant, Anne, Mamede, Anne-Sophie, Wojcieszak, Robert, Sébastien, Paul, Marceau, E., Lamic-Humblot, Anne-Félicie, Marinova, Maya, Briois, Valérie, Stievano, Lorenzo, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Michel Eugène Chevreul - FR 2638 (IMEC), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

46. Activity of enzymes immobilized on plasma treated polyester

Author

Mamede Anne-Sophie, Dhulster Pascal, Mutel Brigitte, Arfaoui Mohamed, Froidevaux Renato, Behary Nemeshwaree, Belhacene Kalim, and Perwuelz Anne

Subjects
chemistry.chemical_classification, Calcium alginate, Chromatography, biology, Immobilized enzyme, Chemistry, Process Chemistry and Technology, Bioengineering, Atmospheric-pressure plasma, Sorption, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Biochemistry, Catalysis, Enzyme assay, 0104 chemical sciences, Polyester, chemistry.chemical_compound, Enzyme, Membrane, biology.protein, 0210 nano-technology
Abstract

The aim of this study was to investigate the effect of 3 different surface plasma treatments on the immobilization of β-galactosidase on a fibrous PET nonwoven membrane. Two methods 1. Entrapment in a thin calcium alginate coating and 2. Direct sorption, were used to immobilize the enzyme. The three different plasma treatments for surface activation of PET nonwovens were: 1. Air atmospheric DBD plasma, 2. Cold remote plasma-CRP with 100% N2 and 3.- CRP with a mixture of N2/O2 gases. Plasma treatment of the PET fiber surface increased the quantity of immobilized enzyme using the entrapment method, and the degree of alginate film cross-linking highly influenced the enzyme activity. Highest enzyme activity was reached for the PET treated with air atmospheric plasma and cross-linked with 0.25 g/l of CaCl2. With the direct sorption method, greater amounts of enzyme were immobilized as compared to the entrapment method, but a considerable proportion of enzyme lost their catalytic activity. Only with the CRP N2/O2 plasma treatment, up to 90% of sorbed enzyme maintained their activity. Reusability study showed that for the optimized entrapment method, a progressive decrease in activity was observed after each use cycle. With the optimized sorption method using N2/O2 CRP plasma, no decrease in enzyme activity was detected, and the immobilized enzyme could be used over more than 15 cycles.

Published
2016
Full Text
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47. Perovskite topotactic conversion into multiporous manganese oxide via acid treatment and its use for formaldehyde remediation

Author

Xu, Yin, Dhainaut, Jérémy, Rochard, Guillaume, Dacquin, Jean-Philippe, Mamede, Anne-Sophie, Lamonier, Jean-Francois, Zhang, Hui, Royer, Sébastien, Wuhan University [China], Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis, ComputingMilieux_MISCELLANEOUS
Abstract

National audience

Published
2018

48. Synthèse d’oxyde de manganèse à porosité multiple par transformation pseudomorphique de LaMnO3 : application à l’élimination du formaldéhyde à basse température

Author

Xu, Yin, Dhainaut, Jérémy, Rochard, Guillaume, Dacquin, Jean-Philippe, Mamede, Anne-Sophie, Lamonier, Jean-Francois, Zhang, Hui, Royer, Sebastien, Wuhan University [China], Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis, ComputingMilieux_MISCELLANEOUS
Abstract

National audience

Published
2018

49. LaFeO 3 Thin Films as Relevant TWC Models Surface Materials

Author

Nandi, Shreya, Blanck, Dimitri, Carlier, Thomas, Chambrier, Marie-Hélène, Mamede, Anne-Sophie, Trentesaux, Martine, Simon, Pardis, Nuns, Nicolas, Roussel, Pascal, Ferri, Anthony, Paul, Jean-François, Berrier, Elise, Unité de Catalyse et de Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Ecole Centrale de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut des Molécules et de la Matière Condensée de Lille (IMMCL), Université de Lille, Sciences et Technologies-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Centre National de la Recherche Scientifique (CNRS), Unité de Catalyse et de Chimie du Solide - Site Artois (UCCS Artois), Université d'Artois (UA)-Université de Lille, Sciences et Technologies-Ecole Centrale de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Centre National de la Recherche Scientifique (CNRS), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, UCCS Équipe Couches Minces & Nanomatériaux, Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille-Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Laboratoire Francis PERRIN (LFP - URA 2453), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centrale Lille Institut (CLIL)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille, Sciences et Technologies, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Lille, Sciences et Technologies-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL), Berrier, Elise, and Université de Lille, Sciences et Technologies-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
XPS, [CHIM.CATA] Chemical Sciences/Catalysis, LEIS, [CHIM.CATA]Chemical Sciences/Catalysis, ToF-SIMS, Raman, LaFeO 3, perovskite, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; Lanthanum orthoferrite, a highly potential three-way catalyst, shaped as apolycrys-talline thin film has been comprehensively analysed by combining bulk and surface characterization techniques. The possibility to accomplish unprecedented surface information has been presented, thanks to the combined use of LEIS, XPS and ToF-SIMS. The structural, morphological and surface properties at nano-metric scale make such thin films indistinguishable from powdered solids. Thus, 5 the relevance of using such model materials for advanced surface investigations of LaFeO 3±δ-based three-way catalysts has been demonstrated.

Published
2018
Full Text
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50. FeMo-based catalysts for acrolein production : an in situ X-ray Photoelectron Spectroscopy study

Author

Simon, Pardis, Mamede, Anne-Sophie, Trentesaux, Martine, Borowiec, Anita, Capron, Mickael, Dumeignil, Franck, Gallet, Jean-Jacques, Bournel, Fabrice, Paul, Jean-Francois, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille

Subjects
[CHIM.CATA]Chemical Sciences/Catalysis, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

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