Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Monique Rigole"'
Publikováno v:
Chemistry of Materials. 17:2369-2377
Sol-gel boria-alumina mixed oxides with a wide range of B / Al atomic compositions have been characterized as dried xerogels in the preceding paper in which a structural model with four domains of composition was proposed. The present paper presents
Publikováno v:
Chemistry of Materials. 17:2361-2368
While boria-alumina mixed oxides have been widely used for various catalytic reactions, their structure has never been satisfactory elucidated and is still a matter of debates. The present paper deals with the elucidation of the structure of boria-al
Autor:
Christian Fernandez, Jean-Paul Amoureux, Jean Grimblot, Monique Rigole, Michel Guelton, Franck Dumeignil
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 158:75-81
Boria–alumina mixed oxides were synthesized by the sol-gel method. MAS-NMR spectroscopy spectra exhibited two boron species, BO 3 and BO 4 , the former giving an important second order quadrupolar effect. Then, spectra were interpreted with a simul
Publikováno v:
Journal de Chimie Physique et de Physico-Chimie Biologique. 96:1536-1542
La RMN du solide et notamment la methode « MQMAS » de 27 Al est utilisee pour caracteriser en detail les catalyseurs d'hydrotraitement du type Mo-P-Al sous forme oxyde. Cette application montre que la RMN est un outil efficace pour determiner la st
Autor:
Emilie Blouet-Crusson, Gérard Hecquet, Michel Fournier, Michel Guelton, Franck Daubrege, Monique Rigole, Antoine Aboukaïs
Publikováno v:
Applied Catalysis A: General. 178:69-83
The oxidative dehydrogenation of isobutyric acid (IBA) to methacrylic acid (MAA) has been studied over cupric salts of undecamolybdovanadophosphoric acid CuxH4−2xPVMo11O40. The presence of copper as counter cation in heteropoly compounds increases
Autor:
Monique Rigole, Michel Guelton, Christian Fernandez, Jean-Paul Amoureux, Jean Grimblot, Juliette Quartararo
Publikováno v:
Journal of Materials Chemistry. 9:2637-2646
A sol–gel method using aluminium tri(sec-butoxide) and orthophosphoric acid, H 3 PO 4 , as the Al and P sources respectively, 2-butanol as the solvent and 1,3-butanediol as the chelating agent has been extensively used to prepare P-alumina catalyti
Autor:
Anne Ponchel, Yolande Barbaux, Monique Rigole, Jean-Pierre Bonnelle, Dominique Courcot, Barbara Grzybowska, Michel Guelton
Publikováno v:
Scopus-Elsevier
Two series of K-promoted V 2 O 5 /TiO 2 catalysts were prepared by: (a) deposition of vanadia on K-doped TiO 2 support (TiK V preparations), and (b) deposition of K on vanadia-titania catalysts (TiV K preparation). They were characterized by 51 V NMR
Publikováno v:
Applied Catalysis A: General. 111:109-118
The oxidative dehydrogenation of isobutyric acid (IBA) to methacrylic acid (MAA) was studied over the heteropolyacid H4VMo11O40 and the acidic salts NaxH4-xPVMo11O40 and CuyH4-2yPVMo11O4. supported on silica, as catalysts. The presence of copper as c
Publikováno v:
Journal de Chimie Physique. 91:909-915
Deux series de catalyseurs V 2 O 5 supportes sur TiO 2 (anatase) contenant entre 8% et 1% en poids de V 2 O 5 ont ete etudies par RMN du 51 V en rotation rapide a l'angle magique. Les supports anatase sont commerciaux mais d'origine differente dans c
Publikováno v:
Chemistry of Materials. 5:1819-1822
BICUVOX.x (Bi[sub 2]V[sub 1-x]Cu[sub x]O[sub 5.5-1.5x]) prepared with different atomic ratios Cu/V and calcined under a dry air at 1093 K have been characterized by electron paramagnetic resonance (EPR). The inverted g anisotropy values of the copper