Hyperspectral full-field quick-EXAFS imaging at the ROCK beamline for monitoring micrometre-sized heterogeneity of functional materials under process conditions

Autor: Valérie Briois, Jean Paul Itié, Alain Polian, Andrew King, Aliou Sadia Traore, Eric Marceau, Ovidiu Ersen, Camille La Fontaine, Laurent Barthe, Anthony Beauvois, Olga Roudenko, Stéphanie Belin

Publikováno v: Journal of Synchrotron Radiation, Vol 31, Iss 5, Pp 1084-1104 (2024)

Full-field transmission X-ray microscopy has been recently implemented at the hard X-ray ROCK–SOLEIL quick-EXAFS beamline, adding micrometre spatial resolution to the second time resolution characterizing the beamline. Benefiting from a beam size v

Externí odkaz: https://doaj.org/article/5f4760b9d56d4404918ced7e8ad31a80

Probing the core and surface composition of nanoalloy to rationalize its selectivity: Study of Ni-Fe/SiO2 catalysts for liquid-phase hydrogenation

Autor: Dichao Shi, Achraf Sadier, Jean-Sébastien Girardon, Anne-Sophie Mamede, Carmen Ciotonea, Maya Marinova, Lorenzo Stievano, Moulay T. Sougrati, Camille La Fontaine, Sébastien Paul, Robert Wojcieszak, Eric Marceau

Publikováno v: Chem Catalysis. 2:1686-1708

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a931d3278aa3f3b852b6af2dc119f646
https://doi.org/10.1016/j.checat.2022.04.009

Using Transient XAS to Detect Minute Levels of Reversible S-O Exchange at the Active Sites of MoS2-Based Hydrotreating Catalysts: Effect of Metal Loading, Promotion, Temperature, and Oxygenate Reactant

Autor: Abhijeet Gaur, Matthias Stehle, Marc-André Serrer, Magnus Zingler Stummann, Camille La Fontaine, Valérie Briois, Jan-Dierk Grunwaldt, Martin Høj

Publikováno v: Gaur, A, Stehle, M, Serrer, M-A, Stummann, M Z, La Fontaine, C, Briois, V, Grunwaldt, J-D & Høj, M 2022, ' Using Transient XAS to Detect Minute Levels of Reversible S-O Exchange at the Active Sites of MoS2-Based Hydrotreating Catalysts: Effect of Metal Loading, Promotion, Temperature, and Oxygenate Reactant ', ACS Catalysis, vol. 12, no. 1, pp. 633-647 . https://doi.org/10.1021/acscatal.1c04767
ACS catalysis, 12 (1), 633–647

Modulation excitation spectroscopy (MES) coupled with time-resolved X-ray absorption spectroscopy (XAS) was applied to unpromoted and Co-promoted Mo-based hydrotreating catalysts (i.e., Mo and CoMo catalysts) for investigating the minute as well as i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b111918f8274d1be9cf937fe8d51f1af
https://orbit.dtu.dk/en/publications/a8549601-130e-4d9e-b485-1226c591e6a2

Bismuth mobile promoter and cobalt-bismuth nanoparticles in carbon nanotube supported Fischer-Tropsch catalysts with enhanced stability

Autor: Alan J. Barrios, Vitaly V. Ordomsky, Camille La Fontaine, Andrei Y. Khodakov, Bang Gu, Thobani G. Gambu, Siddardha Koneti, Mark Saeys, Deizi V. Peron, Simona Moldovan, Mykhailo Vorokhta, Břetislav Šmíd, Mirella Virginie, Valérie Briois

Publikováno v: Journal of Catalysis
Journal of Catalysis, Elsevier, 2021, 401, pp.102-114. ⟨10.1016/j.jcat.2021.07.011⟩
JOURNAL OF CATALYSIS
Journal of Catalysis, 2021, 401, pp.102-114. ⟨10.1016/j.jcat.2021.07.011⟩

Metal nanoparticles on the surface of porous supports have found numerous applications in different areas of science. Fischer-Tropsch synthesis, which proceeds on the surface of cobalt metal nanoparticles, is an efficient way to convert renewables an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11e13e98f3ec6f41f6d166473393014a
https://hal.archives-ouvertes.fr/hal-03438744

Insight into the thermal decomposition of ammonium hexahalogenoiridates(IV) and hexachloroiridate(III)

Autor: Sergey V. Korenev, S. A. Martynova, Igor P. Asanov, Kirill V. Yusenko, Pavel E. Plyusnin, A. I. Gubanov, Valentina V. Zvereva, Olga Roudenko, Camille La Fontaine, Tatyana I. Asanova

Publikováno v: Physical chemistry chemical physics : PCCP. 22(40)

Thermal decomposition of (NH4)3[IrCl6]·H2O, (NH4)2[IrCl6] and (NH4)2[IrBr6] in reductive and inert atmospheres has been investigated in situ using quick-EXAFS and temperature-resolved powder X-ray diffraction. For the first time, (NH4)2[Ir(NH3)Cl5]

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6278ec1dc8a092e98cad2abee8aa6b9
https://pubmed.ncbi.nlm.nih.gov/32820767