초록 ▼

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. A catalyst comprises a porous layer containing from about 20% to about 99% of at least one refractory oxide fr

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. A catalyst comprises a porous layer 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 made up of Pt, Rh, Pd, Ru, Ir and Au, and mixtures thereof. Applications are in the catalytic converter industry.

대표청구항 ▼

A multifunctional catalyst for converting carbon monoxide, hydrocarbons and nitrogen oxides, comprising a substrate coated with a porous layer which consists essentially of at least one catalytically active phase formed by at least one metal M selected from the group consisting of platinum, rhodium,

A multifunctional catalyst for converting carbon monoxide, hydrocarbons and nitrogen oxides, comprising a substrate coated with a porous layer which consists essentially of at least one catalytically active phase formed by at least one metal M selected from the group consisting of platinum, rhodium, palladium, ruthenium, iridium, gold and silver, and mixtures thereof, characterized in that the porous layer consists essentially of, as a weight percentage relative to the anhydrous product: 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, and from about 0.1% to about 20% of said at least one metal M.