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- Title
The Effect of Sr Addition in Cu- and Fe-Modified CeO<sub>2</sub> and ZrO<sub>2</sub> Soot Combustion Catalysts.
- Authors
Rico-Pérez, Verónica; Aneggi, Eleonora; Trovarelli, Alessandro
- Abstract
This study investigates the activity of transition and alkaline-earth metal-doped catalysts supported on ceria or zirconia for the NOx-assisted oxidation of diesel particulate. A series of Cu- and Fe-impregnated catalysts over CeO2 and ZrO2 supportswere prepared by incipientwetness impregnation and characterized by BET, X-ray diffraction (XRD), and temperature-programmed reduction (TPR) experiments while their catalytic activity was investigated in NOx-assisted reaction by means of temperature programmed oxidation experiments (TPO). Higher activity was achieved by copper modified catalysts; the addition of Sr positively affected the performance of the materials, suggesting a synergic effect between transition metals and alkaline-earth metal. The role of copper is correlated to the oxidation of NO to NO2, while strontium seems to be mainly involved in the storage of NOx species.
- Subjects
CATALYSTS; STRONTIUM; COMBUSTION
- Publication
Catalysts (2073-4344), 2017, Vol 7, Issue 1, p28
- ISSN
2073-4344
- Publication type
Article
- DOI
10.3390/catal7010028