| abstract |
The present invention provides novel rare earth element framework-substituted zeolite with higher NOx adsorption capacity, a method for producing the same, a NOx adsorption member using the same, a catalyst for automobile exhaust gas, and the like. A rare earth element framework-substituted zeolite is characterized by containing at least zeolite and at least one or more rare earth elements selected from the group consisting of Ce, La, Nd, and Pr, and the content ratio of the rare earth elements is 100% relative to the total amount. The total amount is 1 to 15% by mass, and a part of Al atoms and/or Si atoms forming the framework of the zeolite is replaced with the rare earth element. |