| abstract |
To provide an exhaust gas purification catalyst having high nitrogen oxide purification performance, and to provide a production method that is simple, efficient, and has a low waste liquid load in the production of the catalyst, and purifies nitrogen oxide. An object of the present invention is to provide a catalyst having high nitrogen oxide purification performance without using expensive precious metals in a catalyst containing a zeolite that can be produced. The present invention relates to a nitrogen oxide purifying catalyst in which a metal is supported on a zeolite containing at least an aluminum atom and a phosphorus atom in a skeleton structure, and when the element mapping of the metal in the catalyst is performed with an electron probe microanalyzer, the metal And a nitrogen oxide purification catalyst containing zeolite, wherein the zeolite in the nitrogen oxide contains at least silicon atoms and phosphorus atoms. The present invention relates to a catalyst for purifying nitrogen oxides, which contains an aluminum atom and has an adsorption retention rate of 80% or more in a repeated water vapor adsorption / desorption test when measured at 90 ° C. |