NDLI: Monitoring of molybdenum H-ZSM5 catalyst preparation by in situ ultraviolet Raman spectroscopy

Content Provider	Springer Nature Link
Author	Rzhevskii, A.M. Choi, P. Ribeiro, F.H. Gulotty, R.J. Olken, M.M.
Copyright Year	2001
Abstract	In situ ultraviolet Raman spectroscopy was used to follow the preparation of Mo/H-ZSM5 catalysts by thermal treatment of a physical mixture of MoO3 and H-ZSM5. The Raman spectra recorded from 300 to 1800 cm−1 during the thermal treatment showed that MoO3 spread over the zeolite support to form dispersed molybdenum oxide species. Curve-fitting analysis of the overall spectral profile for the samples after treatment at 600 °C in O2 showed the presence of three spectral components at 962, 868 and 815 cm−1. The band at 815 cm−1 was assigned to the zeolite support. The most intense band at 962 cm−1 could be attributed to terminal Mo=O groups of isolated tetrahedrally coordinated monomers and the weaker band at 868 cm−1 to bridging Mo–O–Mo groups of dimeric species. These last two assignments are not definitive and may be due to other unique structures of oxides of molybdenum on the zeolite framework.
Starting Page	187
Ending Page	191
Page Count	5
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	73
Issue Number	2-4
e-ISSN	1572879X
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2001-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Industrial Chemistry/Chemical Engineering Pharmacy
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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