| abstract |
The composition according to the invention is based on a weight ratio of at least 5% zirconium oxide, up to 90% cerium oxide, and at least one rare earth metal oxide other than cerium, in an amount of from 0.1% to 2% by weight of silicon It is characterized in that it further comprises an oxide. Such compositions can be used in catalysis, in particular in systems for treating exhaust gases of internal combustion engines. |