Nanoplatelet-based reconstructed hydrotalcites: towards more efficient solid base catalysts in aldol condensations.

Rehydration of Mg-Al hydrotalcite in the liquid phase using ultrasounds or a high stirring speed leads to nanoplatelets with surface areas of 400 m(2) g(-1), displaying catalytic activities in aldol condensations up to 8 times higher than the best catalytic system reported in the literature.

Different morphologies of silver nanoparticles as catalysts for the selective oxidation of styrene in the gas phase.

Silver nanoparticles of different morphologies were prepared using the polyol process and then dispersed on alpha-alumina. Catalysts were tested for the selective oxidation of styrene in the gas phase. Activity and selectivity were strongly dependent on the morphology of the silver nanoparticles.