Patent ID: 8703643

Claim:
A catalyst for NOx storage and reduction comprising: a carrier including alkali metal and Al, or alkali earth metal and Al; a NOx storage element of alkali metal, alkali earth metal or rare earth element; and one or more noble metals that are selected from the group consisting of Pt, Pd, Ru, Ag, Au and Rh, wherein the carrier has a structure of layered double hydroxides that is represented by the following Formula: [Z—Al 2 (OH) 6 ]X. y H 2 O(LiAl 2 —X)], and wherein, Z is Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, or Ra, X is Cl—, Br—, NO 3− , CO 2− 3 or SO 2− 4 , and y is a rational number in the range of 0.5 to 4.