| http://www.w3.org/ns/prov#value | - On the contrary, impregnating the K solution later is advantageous in placing K in the periphery of the other NOx absorber and hence in improving the heat resistance of the catalyst. [0064] In the above method of manufacturing a catalyst for purifying an exhaust gas, in a case where the Ba solution, the K solution, the Sr solution, and the Mg solution are divided into two groups including a group
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