abstract |
The present invention comprises a catalyst comprising a carrier substrate, palladium, and a zeolite having a maximum channel formed by 10 tetrahedral coordinating atoms, and as a passive nitrogen oxide adsorbent, ie, the catalyst. The present invention relates to the use of the catalyst as an exhaust gas system containing an SCR catalyst, and a method of purifying the exhaust gas of an automobile by using the exhaust gas system. |