セリウム、ニオブおよび場合によりジルコニウム、の酸化物に基づく組成物および触媒反応におけるこの使用

摘要

A composition based on cerium and niobium oxide in a proportion of niobium oxide of 2% to 20% is described. This composition can include zirconium oxide, optionally 50% of cerium oxide, 2% to 20% of niobium oxide, and at most 48% of zirconium oxide. Also described, is the use of the composition for treating exhaust gases.