An infrared study of an active no decomposition catalyst

J. Valyon, W. K. Hall

Research output: Contribution to journalArticle

36 Citations (Scopus)


NO was adsorbed on Cu-ZSM-5 at temperatures between 173 K < T < 73K. The IR spectra indicated that three types of adsorbed NO species are formed: NOᵟ+ (1900 cm-1), NOᵟ− (1810 cm-1) and dimeric or dinitrosyl (NO)2 (1824 cm-1 and 1730 cm-1). Disproportionation of NO at low temperature produced N2O and NO2. Bands stemming from adsorption of these species were also observed. It was found that an equilibrium exists between the NOᵟ- and (NO)2 species bound to reduced Cu sites. The results suggest that the same (NO)2 species which is a possible intermediate in NO disproportionation at low temperature (≤ 298 K) can be a transient state in NO decomposition at high temperature (> 600 K).

Original languageEnglish
Pages (from-to)1339-1350
Number of pages12
JournalStudies in Surface Science and Catalysis
Issue numberC
Publication statusPublished - Jan 1 1993

ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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