Redox properties and metal-support interaction of Pd/Ce0.67Zr0.33O2-Al2O3 catalyst for CO, HC and NOx elimination

- PdOx species maintain oxidized state and good thermal stability on Pd-Ce interface.
- PdOx species migrate from Al2O3-rich grains to ceria-based oxide surface after aging treatment.
- Pd/Ce0.67Zr0.33O2-Al2O3 catalyst shows good thermal stability.
- Surface reaction of CO, HC and NOx on the catalysts has been studied in detail by in-situ drifts.