A study of the dispersion of molybdenum(VI) supported on silica and .gamma.-alumina

Autor:	Serge Kaliaguine, L. E. Makovsky, John M. Stencel, P. C. Roberge, K. Marcinkowska, J.R. Diehl, L. Rodrigo, A. Adnot
Rok vydání:	1986
Předmět:	Inorganic chemistry General Engineering chemistry.chemical_element Chemical reaction Electron spectroscopy Catalysis symbols.namesake chemistry Chemisorption Molybdenum symbols Physical and Theoretical Chemistry Spectroscopy Raman spectroscopy Dispersion (chemistry)
Zdroj:	The Journal of Physical Chemistry. 90:2690-2696
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100403a027
Popis:	A comparative study of O/sub 2/ chemisorption on molybdenum supported on silica and ..gamma..-alumina is reported. The catalysts had been prepared either by pore-filling impregnation or by reaction of the surface OH groups with the eta-allyl complex of Mo. The same catalysts have been the object of a systematic study of ESCA intensity ratio showing that this last method yields information concerning Mo dispersion and surface segregation. The two series of silica-supported catalysts were also analyzed by laser Raman spectroscopy and ion-scattering spectroscopy. In particular, the LRS study shows the presence of MoO/sub 3/ microcrystals at Mo loadings as low as 2% on impregnated silica catalysts and of silicomolybdic anions down to 1 wt % Mo on both series of silica-supported catalysts.
Databáze:	OpenAIRE
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