Table 3.

NO_x storage capacities over Co-MgAlO and the K-promoted catalysts. Adapted with permission from [13]. Copyright © 2009, Elsevier, Inc.

Sample	NOx Uptake (mg/gcat)
Co-MgAlO	24.10
1.5% K/Co-MgAlO	31.75
4.5% K/Co-MgAlO	51.88
7.5% K/Co-MgAlO	56.03
10% K/Co-MgAlO	61.24