Zobrazeno 1 - 10
of 181
pro vyhledávání: '"V.M. Mastikhin"'
Publikováno v:
Catalysis Letters. 42:99-104
The structure of 12-tungstophosphoric heteropoly acid (H3PW12O40) supported on silica has been studied by129Xe NMR of adsorbed xenon. The129Xe NMR spectra are found to depend on the surface HPA concentration. The129Xe NMR data provide evidence for th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f45d21dbb4e373961a00a2e2981e225
https://doi.org/10.1007/bf00814473
https://doi.org/10.1007/bf00814473
Autor:
Victor V. Terskikh, S.V. Filimonova, V.M. Mastikhin, Helmut Knözinger, Olga B. Lapina, M. Seidl
Publikováno v:
Solid State Nuclear Magnetic Resonance. 4:369-379
1H magic-angle spinning nuclear magnetic resonance (MAS NMR) spectra of TiO chi/SiO2 catalysts suggest the interaction of surface TiO chi species with Si-OH groups of the silica. Simultaneously, Ti-OH groups from surface titania species appear. The d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c42179927bbf396851a6d44a0a73aed1
https://doi.org/10.1016/0926-2040(95)00020-q
https://doi.org/10.1016/0926-2040(95)00020-q
Publikováno v:
Solid State Nuclear Magnetic Resonance. 4:59-64
Amorphous aluminum orthophosphate is used as a carrier for preparing a series of V2O5-AlPO4 catalysts with varying vanadia content. The catalysts were characterized by solid-state 51V and 1H magic-angle spinning nuclear magnetic resonance (MAS NMR),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56123e7a04e5dbbfd33210a8ef646845
https://doi.org/10.1016/0926-2040(94)00031-7
https://doi.org/10.1016/0926-2040(94)00031-7
Publikováno v:
Zeolites. 14:629-634
Properties of the ZSM-5 zeolite modified with VO2+ ions in a one-step exchange reaction in water medium have been investigated. Physicochemical characterization (chemical analysis, XRD, MAS n.m.r., e.s.r.) shows that during the preparation the ZSM-5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb1301fd3b36f20a264fcf29dab0fb99
https://doi.org/10.1016/0144-2449(94)90119-8
https://doi.org/10.1016/0144-2449(94)90119-8
Publikováno v:
Journal of Molecular Catalysis. 88:311-323
1 H solid state NMR data show the existence of several types of hydroxyl groups on TiO 2 surface, depending on the surface impurities. VOCl 3 selectively interacts with these groups. According to 51 V NMR data, the structure of the surface vanadium c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8075a231c64430d004ba3f91411fb1b6
https://doi.org/10.1016/0304-5102(93)e0277-n
https://doi.org/10.1016/0304-5102(93)e0277-n
Publikováno v:
Journal of Molecular Catalysis. 87:57-66
The 51V and 1H solid-state NMR data show the formation in V2O5-TiO2-SiO2 catalysts of a number of surface tetrahedral and octahedral V complexes, with their types depending upon the sequence of titanium deposition. Among them triple complexes contain
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25371781fe21d49e7f8f571f471fd5b6
https://doi.org/10.1016/0304-5102(93)e0182-g
https://doi.org/10.1016/0304-5102(93)e0182-g
Publikováno v:
ChemInform. 23
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::795bfefcd1206dab87d075aef551188a
https://doi.org/10.1002/chin.199247022
https://doi.org/10.1002/chin.199247022
Publikováno v:
ChemInform. 26
Tetrahydrofuran recyclization to thiolane (the Yuriev reaction) was studied in the presence of alumina. Thiolane formation at 200–500°C was found to be accompanied by cracking of both the initial matter and the product, yielding hydrocarbons and c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b569aee0213e277743aa8b5e0e642f09
https://doi.org/10.1002/chin.199506040
https://doi.org/10.1002/chin.199506040
Publikováno v:
Catalysis Letters. 13:203-211
Vanadium oxide promoted Rh/SiO2 catalyst precursors which were calcined at 573, 773, 973 and 1173 K, were characterized by51V-NMR. V2O5 is present in all materials and RhVO4 is formed at 1173 K. An additional interaction species with vanadium in dist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78dd829c9e30614ffe86a20cc8ab17ee
https://doi.org/10.1007/bf00770992
https://doi.org/10.1007/bf00770992
Publikováno v:
Journal of Molecular Catalysis. 71:69-79
By using 51V NMR spectroscopy the process of partial dissolution of the V2O5 of vanadia-alumina catalysts by 0.3 N NH4OH was studied and samples prepared by impregnation and partial dissolution were compared. The relative participation of three vanad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::083dffb43155f7f5d975ea79bf3c5ce4
https://doi.org/10.1016/0304-5102(92)80008-5
https://doi.org/10.1016/0304-5102(92)80008-5