Promoting effect of alkaline earth metal doping on catalytic activity of HC and NOx conversion over Pd-only three-way catalyst

- Doping of alkaline earth improves the catalytic activity of HC and NOx conversions.
- Ba, Sr and Ca modified catalysts present improved electron and oxygen transfer.
- Alkalinity and electron-donating ability favor the adsorption and activation of NOx.
- Pd/CZBa exhibits the best catalytic performance before and after aging treatment.