| abstract |
Catalytic system suitable in particular for eliminating CO, comprising or consisting of an oxide, preferably of fluorite crystalline structure, corresponding to the molar formula: Ce 1-u M y A z D v O 2-x , in which Ce is cerium, A represents at least one element having several degrees of oxidation chosen from Ti, Ga, In, V, Cr, Mn, Fe, Sn, Co, Ni and Cu, M represents at least one element chosen from Gd, Y, Se, Sm, Nd, Pr and Zn, D represents at least one element different from A and chosen from Pt, Pd, Rh, Ru, Cu, Fe, Ag and Au, u is between 0.05 and 0.45, y is between 0.01 and 0.4, z is greater than 0 and less than 0.4, v is between 0.001 and 0.4 and x is greater than 0. |