MULTIFUNCTIONAL CATALYSTS, CONTAINING CERIUM AND URANIUM, AND AT LEAST ONE METAL FOR THE CONVERSION OF POLLUTANTS EMITTED BY INTERNAL COMBUSTION ENGINES AND THEIR PREPARATIONS

摘要

The invention relates to a multifunctional catalyst containing cerium, uranium and at least one metal for the conversion of pollutants emitted by internal combustion engines and their preparations. / P P This catalyst comprises a layer porous material containing: from about 20% to about 99% of at least one refractory oxide; from about 0.8% to about 70% of at least one cerium oxide; from about 0.1% to about 50% of at least one uranium oxide; from about 0.1% to about 20% of a metal selected from the group consisting of Pt, Rh, Pd, Ru, Ir, Au and mixtures thereof. / P P Application to the industry of catalytic converters.