The role of SO2 in the reduction of NO by CO on La2O2S

Ngai T. Lau, Ming Fang, Chak K. Chan

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


The decomposition of NO and the reduction of NO by CO on La2O2S were studied using temperature-programmed reaction technique coupled with fast mass spectrometry, powder X-ray diffraction and X-ray photoelectron spectroscopy. The role of SO2 plays in the reduction is explored. It is found that the decomposition of NO is a favorable reaction step for the reduction of NO by CO achieved through a sulfur-assisted path. The oxygen produced in the decomposition is removed by the sulfur in the oxysulfide as SO2, which in turn is reduced back to sulfur by CO on La2O2S. An external supply of sulfur, such as SO2, in the feed is needed to maintain the population of sulfur in the oxysulfide and thus make the reduction sustainable. © 2006 Elsevier Inc. All rights reserved.
Original languageEnglish (US)
Pages (from-to)301-307
Number of pages7
JournalJournal of Catalysis
Issue number2
StatePublished - Jan 25 2007
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-07-06

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry


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