要約

Catalysts containing 10 wt.% of Pt and MnO₂ supported on coated metallic foams by γ−alumina were examined for H₂O₂ decomposition. Catalysts were prepared by impregnation of a high-porous γ−alumina (coating layer) surface area. Surface area measurements, SEM micrographs, and H₂ chemisorption gave evidence of a uniform distribution of the active phases. Catalytic tests were performed in a batch reactor with 30 wt.% concentration of H₂O₂ solution. The catalytic activity, defined by temperature of ejected gas products and the pressure slopes, was higher at the beginning of the tests and decreased versus time in the case of both foam catalysts. Otherwise, MnO₂-based catalyst was more active for this application.