Alkali metals as promoters in Co-Mn-Al mixed oxide for N2O decomposition

- N2O conversion decreased in order Cs > Rb > K > Na = Co4MnAlOx > Li.
- Alkali metals modified electronic properties and acid-base function of surface.
- Promotional effect of alkali metals is connected with their ionization potential.
- Charge transfer and a decrease in binding energies was caused by alkali metals.
- Good stability of K-promoted Co-Mn-Al mixed oxide catalyst in real waste gas