Spectrochimica Acta - Part A Molecular Spectroscopy p. 733 - 740 (1996)
Update date:2022-08-12
Topics:
Martin, Cristina
Martin, Ines
Rives, Vicente
Grzybowska, Barbara
Gressel, Irena
The transformation of isopropanol on MoO3/TiO2 catalysts doped with alkali-metal cations has been studied by the pulse technique. The FTIR studies have provided evidence of the dissociative adsorption of isopropanol and the formation of isopropoxide species which decompose at higher temperatures to acetone. Catalytic measurements have shown that the addition of alkali-metal cations leads to a drastic decrease in the yield of propene, owing to the elimination of Bronsted centres originally existing on the catalyst surface, whereas the rate of dehydrogenation to acetone is affected only slightly. The extent of the changes observed depends on the nature of the doping alkali-metal cation.
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