COMPOSITION CONSISTING OF A CERIA-ZIRCONIA MIXED OXIDE WITH INCREASED REDUCIBILITY, PRODUCTION METHOD AND USE IN THE FIELD OF CATALYSIS

摘要

The invention relates to a composition essentially consisting of ceria-zirconia mixed oxide, with a ceria content of at least 60 wt. % and, after 4 hours of calcination at 1000° C., a specific surface area of at least 15 m2/g and a quantity of mobile oxygen between 200° C. and 400° C. of at least 0.7 ml 02/g. Said composition is produced using a method wherein a mixture of cerium and zirconium compounds is continuously reacted with a basic compound in a reactor, with a maximum residence time of the reactive medium in the mixture zone of the reactor of 100 milliseconds; and the precipitate is heated then brought into contact with a surfactant before being calcinated.