These soot combustion experiments performed with NOx xA xA

The ceria catalyst formulations selected are periosteum the most active for Ce–Zr mixed oxide catalysts (with 20 molar % zirconium) [19] and Ce–Pr mixed oxides catalysts (with 50 molar % praseodymium) [14], according to previous studies. The different catalysts of each composition have been prepared following different synthesis procedures (calcination of a physical mixture of nitrates, coprecipitation, and reverse microemulsion) and a commercial Ce–Zr mixed oxide calcined at 500 and 800 °C has been also included.