Catalysis Letters, Vol.40, No.3-4, 241-247, 1996
Fluorinated Gamma-Alumina Aerogels and Xerogels - Characterization and Catalytic Behavior
The porosity of gamma-alumina-based materials is an important parameter affecting the extent of fluorination (aerogels > commercial gamma-Al2O3 > xerogels) and, consequently, also the textural, acidic and catalytic properties of the final fluorinated materials. Only the highly fluorinated aluminas having strong Lewis acidic sites catalyse the isomerisation of CHF2CHF2 to CF3CH2F.