Further Insights into the Key Features of Ceria-Zirconia Mixed Oxides Governing the Catalysed Soot Combustion Under NO_x/O2

摘要

Eighteen Ce_(0.76)Zr_(0.24)O2 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.