Abstract
The formation of a novel type of coated catalyst with definite texture is described. The oxidic coating is formed by anodic oxidation of aluminium and a metallic core is preserved. The textural properties for two separately produced catalysts were determined. To obtain this result, high-pressure Hg-porosimetry, N 2 adsorption (BET), light-optical microscopy and electron microscopy (SEM, TEM) were applied. On the basis of the hexagonal cell model, proposed by Keller, Hunter and Robinson the specific surface areas and the specific pore volumes were calculated. The comparison between calculated and measured values correlates well and shows, that the formation of Al 2O 3-coated catalysts by anodic oxidation of aluminium is reproducible.
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