Abstract
Three different ordered mesoporous silica materials, such as MCM-41, Al-containing MCM-41 (with 1.6wt% of Al incorporated into the silica framework) and SBA-15, were prepared. Furthermore, aluminum (1.8wt%) was grafted on the silica surface by the molecular designed dispersion method (MDD). In a next step, rhodium (1.4–2.9wt%), as an active metal for the catalytic reaction of N2O decomposition, was introduced by the MDD technique. The following order of the catalytic activity was found under an inert atmosphere: Al(incorporated)-MCM-41+Rh>MCM-41+Al(grafted)+Rh>SBA-15+Rh≈MCM-41+Rh. The influence of textural properties, total acidity and rhodium dispersion on the activity of catalysts was studied.
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