COMPOSITION COMPRISING CERIUM OXIDE AND ZIRCONIUM OXIDE HAVING A SPECIFIC POROSITY, PREPARATION METHOD THEREOF AND USE OF SAME IN CATALYSIS

摘要

The invention relates to a composition comprising cerium and zirconium oxides, containing at least 30 wt.-% cerium oxide. Following calcination at a temperature of 900°C for 4 hours, the composition has two populations of pores, the diameters of the first population being centered around a value of between 5 nm and 15 nm for a composition containing 30% to 65% cerium oxide or between 10 nm and 20 nm for more than 65% cerium oxide and the diameter of the second population being centered around a value of between 45 nm and 65 nm for 30% to 65% cerium oxide or between 60 nm and 100 nm for more than 65% cerium oxide.