In supported samples, the surfaces V/Sb are close to the calculated ones.
The SiO2 supported samples contained HPW at 2, 4, and 8 wt% W loading levels.
In a hydrogen/nitrogen atmosphere partial decomposition of cobalt nitrate occurs before reduction is initiated with both supported samples.
On the other hand, MgO supported samples undergo only sintering processes with reduction of surface area upon treatment at 1100°C.
The surface properties and acidity of the V2O5/TiO2/SiO2 materials were examined relatively to the corresponding silica and titania supported samples.
The impregnated SBA-15 supported samples were calcined or not before reduction, but it had no effect on the activities.
FTIR spectra of mechanical mixtures of H3PW are similar to the supported samples, thus this method cannot distinguish these materials.
Titania supported samples on different types of silica have been prepared through a sol gel method followed by hydrothermal processing.
In general, the silica supported samples were less active than the alumina supported ones, probably due to the presence of large gold particles.
By comparison to Al2O3 supported samples, the higher activities observed for the zirconia supported catalysts have been related to the morphology of the sulfide phase.
