| abstract |
The present invention relates to the use for the reduction of NO, in particular NO, type oxidizing pollutant species contained in a gas to be purified, of a catalytic system comprising or consisting of an oxide corresponding to the molar formulation: embedded image in which: - It is cerium, - M is an element chosen from: Gd, Y, Sc, Sm, La, Pr, Nd, Er, Tb, - y is between 0.01 and 0.4, N is an element having several degrees of valency selected from: Ti, V, Cr, Mn, Fe, Co, Ni, Cu, - z is less than 0.4, - x is greater than 0.05. |