Výsledky vyhledávání - "A. M Le Govic"

On the reducibility of sulfated Pt/CeXZr1−XO2 solids: A coupled thermogravimetric FT-IR study using CO as the reducing agent

Autor: Virginie Harle, Jean Claude Lavalley, A. M Le Govic, Philippe Bazin, Olivier Marie, Gilbert Blanchard, Marco Daturi, Odette Saur

Publikováno v: Applied Catalysis B: Environmental
Applied Catalysis B: Environmental, Elsevier, 2012, 119 (DOI: 10.1016/j.apcatb.2012.02.037), pp.207--216

The reducibility of sulfate species by CO was studied over ceria and Ce0.63Zr0.37O2 mixed oxide with or without platinum, using infrared spectroscopy and thermogravimetry. The mechanism for sulfate reduction appeared to be based on three main points.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f77abb860732132a0e912f5e2a01f19
https://doi.org/10.1016/j.apcatb.2012.02.037

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Synthesis of TS-1 in fluoride medium. A new way to a cheap and efficient catalyst for phenol hydroxylation

Autor: Eric Fache, Jean-Louis Grieneisen, A. M Le Govic, H. Kessler

Publikováno v: Microporous and Mesoporous Materials. 37:379-386

Titanium silicalite-1 (TS-1) was synthesized by two different methods in fluoride medium. The preparation of a sol or a gel containing SiOTi bonds prior to fluoride addition is the key step of the synthesis. Characterization of the samples by X

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eaf45c5f6c8302550be5944fbf0d0e59
https://doi.org/10.1016/s1387-1811(00)00174-8

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Raman diffusion study of impregnated and coprecipitated SnMo catalysts

Autor: A. M. Le Govic, Bruno Amram, M. Gubelmann-Bonneau, H. Pernot

Publikováno v: Vibrational Spectroscopy. 9:65-68

The purpose of our work was to study the synthesis-structure relationship of SnMo catalysts, obtained by impregnation or coprecipitation, by Raman spectroscopy. These catalysts are used in the selective oxidation of propane. Ex situ examination an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d53a5873d7f71d9607c0be70eb0b85a4
https://doi.org/10.1016/0924-2031(94)00067-q

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A thermogravimetric and FT-IR study of the reduction by H2 of sulfated Pt/CexZr1-xO2 solids

Autor: Odette Saur, A. M Le Govic, Virginie Harle, Gilbert Blanchard, Frederic Meunier, Jean Claude Lavalley, Marco Daturi, Philippe Bazin

Publikováno v: Applied Catalysis B: Environmental
Applied Catalysis B: Environmental, Elsevier, 2009, 90 (3-4), pp.368--379
Applied Catalysis B: Environmental, 2009, 90 (3-4), pp.368-379

The nature, concentration and reducibility by H 2 of sulfate species formed from SO 2 oxidation were studied over a range of Pt/Ce x Zr 1− x O 2 catalysts using infrared spectroscopy and thermogravimetry. Ionic sulfates were formed over ceria and C

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fd75026abc544f9b0dc14d274b75ea6
https://hal.archives-ouvertes.fr/hal-01840546

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Comparative sulfur storage on Pt catalysts : effect of the support (CeO2, ZrO2 and CeO2-ZrO2)

Autor: Jean Claude Lavalley, Gilbert Blanchard, A. M. Le Govic, Odette Saur, Philippe Bazin

The effect of the support on the nature, amount and reducibility of the sulfate species formed from SO 2 oxidation on Pt catalysts has been studied by IR spectroscopy and thermogravimetry. Only surface species are observed on pure zirconia while bulk

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::710994059bd09bed369a81be26a2d96b
https://doi.org/10.1016/s0167-2991(98)80912-9

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Effect of Physicochemical Characteristics of ZrO2-Y2O3 Powders on the Compaction Behavior and Microstructure Development

Autor: D. Broussaud, Jean-Yves Chane-Ching, A. M. Le Govic

Publikováno v: Zirconia’88 ISBN: 9789401070058

Inter-relations between compaction ability, density homogeneity, green strength and particle morphology were explored using submicronic, ZrO2-Y2O3 (3% molar Y2O3) commercial powders. The effect of chemical characteristics such as impurities content a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3fba3186eb65d9f7e45b538e6a983aba
https://doi.org/10.1007/978-94-009-1139-0_3

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Oxygen mobility in CeO2 and CexZr(1-x)O2 compounds: Study by CO transient oxidation and O-18/O-16 isotopic exchange

Autor: A. M. Le Govic, Y. Madier, Daniel Duprez, Claude Descorme

Publikováno v: ResearcherID
Journal of Physical Chemistry B
Journal of Physical Chemistry B, American Chemical Society, 1999, 103 (50), pp.10999-11006. ⟨10.1021/jp991270a⟩

SSCI-VIDE+CARE+CDS; International audience; Cerium-zirconium mixed oxides (CexZr(1-x)O2), precalcined at 900 degrees C in dry air, were supplied by Rhodia Terres Rares as monophasic solid solutions. Introduction of some zirconium atoms in the ceria l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bf07a874a2e6b063145f529ec6ee17b
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000084424500004&KeyUID=WOS:000084424500004

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