NO x storage and reduction properties of ceria-promoted lean NO x trap catalysts

Chuan Shi, Yaying Ji, Uschi Graham, Gary Jacobs, Todd J. Toops, Mark Crocker

Research output: Contribution to journalConference articlepeer-review


As part of our investigations into the function of ceria in lean NOx trap catalysts, this study focuses on the use of ceria as a NOx storage component and as a support material. Model power catalysts were prepared in which ceria functioned either as a support for the main Ba NOx storage phase, or as the main NOx storage component itself. Relative to a ceria-free Pt/BaO/Al 2O 3 reference catalyst, catalysts containing both Ba and CeO 2 were found to exhibit superior NO x storage capacity at 200 and 300 °C, while analytical data indicated that the use of CeO 2 as a support afforded more a highly dispersed Ba phase in comparison to Al2O 3. In addition, regeneration behavior at low temperature was greatly improved by the presence of CeO 2. These factors contributed to the superior NO x storage-reduction performance exhibited by the CeO 2-containing catalysts under lean-rich cycling conditions in the temperature range 200-300 °C.

Original languageEnglish
JournalACS National Meeting Book of Abstracts
StatePublished - 2011
Event242nd ACS National Meeting and Exposition - Denver, CO, United States
Duration: Aug 28 2011Sep 1 2011

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


Dive into the research topics of 'NO x storage and reduction properties of ceria-promoted lean NO x trap catalysts'. Together they form a unique fingerprint.

Cite this