| Abstract
| - The relationship between the acidity, catalytic activity, and surface structure for tungsten oxide supported onzirconia was investigated for a series of solids prepared by equilibrium adsorption on monoclinic zirconia.The catalysts were active for propanol dehydration only above a threshold in W loading. The acidity wasstudied by infrared spectroscopy of adsorbed probe molecules (2,6-dimethylpyridine and CO), and the onsetof activity was correlated with that of the formation of relatively strong Brønsted acid sites. The variation inthe abundance of these sites correlated with the catalytic activity. Lewis sites were present but could not bedirectly associated with the activity. Raman, IR, and UV spectroscopy results indicated that the active siteswere related to polymeric W surface species.
|
