Multifunctional catalysts containing cerium, uranium and at least one other metal, for converting pollutants emitted by internal combustion engines, and their preparation

摘要

The invention concerns a multifunctional catalyst containing cerium, uranium and at least one metal, for converting pollutants emitted by internal combustion engines, and their preparation.PPA catalyst comprises a porous layer containingPPfrom about 20% to about 99% of at least one refractory oxidePPfrom about 0.8% to about 70% of at least one cerium oxidePP from about 0.1% to about 50% of at least one uranium oxideP Pfrom about 0.1% to about 20% of a metal selected from the group made up of Pt, Rh, Pd, Ru, Ir and Au, and mixtures thereof.PP Applications are in the catalytic converter industry.