MULTIFUNCTIONAL CATALYST FOR THE TREATMENT OF EXHAUST GASES OF INTERNAL COMBUSTION ENGINES CONTAINING URANIUM, AT LEAST ONE PROMOTER OF URANIUM AND AT LEAST ONE PRECIOUS METAL, AND ITS PREPARATION

摘要

The invention relates to a multifunctional catalyst, its preparation process and its use for the treatment of exhaust gases from internal combustion engines. /P P According to the invention, the catalyst comprises a porous layer containing in% dry weight: about 50 to about 99.7% of at least one refractory inorganic oxide; - about 0.1 to about 25% of at least one uranium oxide; - about 0.1 to about 35% of at least one oxide of at least one metal P chosen from the group formed by lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium, strontium, barium, lanthanum, praseodymium, neodymium, gadolinium, yttrium, and zirconium, and; - approximately 0.1 to approximately 20% of a metal A chosen from platinum, rhodium, palladium, ruthenium, iridium and their mixtures.