Laser Raman spectra of pyridine adsorbed on various oxidic cobalt molybdate hydrodesulfurization catalysts were recorded. Bronsted acidity resulted as molybdenum was added to the γ-Al2O3 surface. However, inhibition of pyridine adsorption occurred when large amounts of MoO3 were formed. Addition of cobalt to Mo/γ-Al2O3 catalysts produced a new adsorption site whose pyridine adsorption bands were intermediate between bands for Bronsted and Lewis acidity. The results demonstrate that pyridine adsorption can be used to determine the structural arrangement of molybdenum and cobalt species on the γ-Al2O3 surface.
|Original language||English (US)|
|Number of pages||7|
|Journal||Journal of physical chemistry|
|State||Published - Dec 1 1983|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry