Rare earth (La, Nd, Pr) doped ceria zirconia solid solutions for soot combustion

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Title: Rare earth (La, Nd, Pr) doped ceria zirconia solid solutions for soot combustion
Authors: Dulgheru, Petrica
Sullivan, James A.
Permanent link: http://hdl.handle.net/10197/4256
Date: May-2013
Abstract: A series of rare earth (RE) (La, Nd, Pr) ceria zirconia materials were analysed for their soot combustion activity in air and in NO/O2. The materials were characterised using DRIFT spectroscopy. In general the presence of the RE dopant increases the activity of undoped CexZr1-xO2. The La and Pr doped catalysts showed increased low temperature activity in the presence of NO/O2 while the effect was less pronounced in case of Nd - doped samples. FTIR data has shown that the catalysts interact differently to NO/O2 mixtures in that they do not form significant quantities of adsorbed nitrite-type species. We postulate that this species is a precursor to NO2 formation which in turn increases soot combustion.
Type of material: Journal Article
Publisher: Springer
Copyright (published version): 2013 Springer
Keywords: Lean burn;Rare earth oxides;Soot;Particulate matter;Diesel engines;Soot oxidation;DRIFTS spectroscopy;TGA
DOI: 10.1007/s11244-013-0006-5
Language: en
Status of Item: Not peer reviewed
Appears in Collections:Chemistry Research Collection

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