FIELD: chemistry.
SUBSTANCE: catalytic converter comprises a bulk substrate coated with a catalytic composition comprising a mixed metal catalyst, wherein the mixed metal catalyst contains pure palladium and a palladium-gold alloy on a carrier, where Pd:Au atomic ratio in the mixed metal catalyst is from 95:5 to 80:20 and wherein the palladium-gold alloy is enriched in gold, and at least one promoter, wherein the mentioned promoter comprises at least one reducible metal oxide, wherein at least one promoter is a carrier for the mixed metal catalyst and wherein ceric oxide is a promoter and carrier. The invention also relates to an exhaust gas purification system of an internal combustion engine and to a device comprising such a purification system.
EFFECT: increased degree of purification.
13 cl, 3 dwg, 6 tbl, 6 ex
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