| abstract |
The present invention provides the NOx distintegrants for possessing excellent NOx resolution ratios.A kind of NOx distintegrants, it contains the perofskite type oxide being expressed from the next：AB x‑1 M x O 3 ；The A represents to be selected from more than by one or both of La, Sr, Mg, Ca and Ba group formed, the B represents Mn, the M represents to be selected from represents 0 less than 1 by the first more than one or both of Ti, Zr, Hf, Nb, Ta, Cr, Mo, W and Ce group formed metallic element with being selected from the combination by one or both of Ca and the Mg group formed the second metallic element, x. |