Laser Raman spectroscopy of cobalt-molybdenum/.gamma.-aluminum oxide catalysts. Characterization using pyridine adsorption

1983 ◽  
Vol 87 (19) ◽  
pp. 3675-3681 ◽  
Author(s):  
G. L. Schrader ◽  
C. P. Cheng
Keyword(s):  
Raman Spectroscopy ◽  
Aluminum Oxide ◽  
Oxide Catalysts ◽  
Laser Raman Spectroscopy ◽  
Pyridine Adsorption ◽  
Laser Raman

Controlled-Atmosphere Rotating Cell for in Situ Studies of Catalysts Using Laser Raman Spectroscopy

1980 ◽  
Vol 34 (2) ◽  
pp. 146-150 ◽  
Author(s):  
C. P. Cheng ◽  
J. D. Ludowise ◽  
G. L. Schrader
Keyword(s):  
Raman Spectroscopy ◽  
Molybdenum Trioxide ◽  
Laser Raman Spectroscopy ◽  
Controlled Atmosphere ◽  
Pyridine Adsorption ◽  
Laser Raman ◽  
Considerable Portion ◽  
Adsorbed Pyridine ◽  
New Form

Laser Raman spectroscopy was used to characterize molybdenum on alumina catalysts using a controlled-atmosphere rotating cell. In situ spectra could be recorded at temperatures up to 600°C and pressures as low as 1.333 × 10−4 Pa. Catalysts were examined during the drying and calcining operations; adsorption of pyridine was also studied. Spectra of the dried and calcined catalysts indicated the presence of aggregated molybdenum species. Close resemblance to the aggregation of molybdenum species in aqueous solution was apparent. At higher loadings of molybdenum, a molybdenum trioxide phase developed. Adsorbed pyridine spectra indicated that a considerable portion of the alumina surface was not covered by molybdenum even after molybdenum trioxide was formed. A new form of pyridine adsorption associated with the aggregated phase was observed.

Oxygen chemisorption and laser Raman spectroscopy of unsupported and silica-supported vanadium oxide catalysts

1989 ◽  
Vol 93 (18) ◽  
pp. 6786-6790 ◽  
Author(s):  
S. Ted Oyama ◽  
Gregory T. Went ◽  
Kenneth B. Lewis ◽  
Alexis T. Bell ◽  
Gabor A. Somorjai
Keyword(s):  
Raman Spectroscopy ◽  
Vanadium Oxide ◽  
Oxide Catalysts ◽  
Laser Raman Spectroscopy ◽  
Laser Raman ◽  
Oxygen Chemisorption

Laser Raman spectroscopy of supported vanadium oxide catalysts

1990 ◽  
Vol 94 (10) ◽  
pp. 4240-4246 ◽  
Author(s):  
Gregory T. Went ◽  
S. Ted. Oyama ◽  
Alexis T. Bell
Keyword(s):  
Raman Spectroscopy ◽  
Vanadium Oxide ◽  
Oxide Catalysts ◽  
Laser Raman Spectroscopy ◽  
Laser Raman
Sign in / Sign up

Export Citation Format

Share Document