SILICA MONOLAYER SOLID ACID CATALYST PREPARED BY CVD

For the design of novel acid catalysts it is Important to understand t he principles of the generation of acidity. However, the origin of thi s acidity is unclear because the mixed solid-acid usually possesses a complicated structure leading to different types of sites. The CVD of silica is being used on high surface area basic oxides to provide mode l compounds to elucidate the formation and functioning of acid catalys ts. This paper reviews these studies and also shows how novel heat res istant catalysts can be obtained.