Abstract :
The acid–base properties of supported gallium oxide catalysts have been investigated by microcalorimetry and FTIR spectroscopy of pyridine (acidity) and CO2 (basicity) adsorption. Pyridine adsorption microcalorimetry has shown that loading supports such as γ-Al2O3, TiO2, and ZrO2 with gallium oxide in a surface concentration close to the theoretical monolayer, resulted in a decrease of the surface acidity of the catalysts compared to that of the supports, while, in the case of SiO2, new Lewis acid sites were created. The number of acid sites for the supported and bulk gallium oxide catalysts was in the following order: Ga2O3/SiO2
Journal title :
Food Microbiology
Journal title :
Food Microbiology