Further Insights into the Key Features of Ceria–Zirconia Mixed Oxides Governing the Catalysed Soot Combustion Under NO x /O2

摘要

Eighteen Ce0.76Zr0.24O2 samples have been prepared by different procedures and characterised by N2 adsorption at –196 °C, XRD, Raman spectroscopy, H2-TPR and XPS. The catalytic activity for soot combustion depends both on the BET surface area and on the Ce/Zr atomic surface ratio, which strongly depends on the preparation procedure.