Influence of the surface potassium species in Fe-K/Al2O3 catalysts on the soot oxidation activity in the presence of NOx

- Cordierite monolith supported K/Fe/Al2O3 catalysts were prepared.
- Influence of calcination temperature was studied.
- Different K-species present as a consequence of different calcination temperatures.
- K-species determine NOx adsorption-desorption mechanism.
- K-species determine deNOx and deSoot activity and catalyst stability.