Isotopic study of nitrous oxide decomposition on an oxidized Rh catalyst: Mechanism of oxygen desorption

H. Uetsuka, K. Aoyagi, S. Tanaka, K. Yuzaki, S. Ito, S. Kameoka, K. Kunimori

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22 Citations (Scopus)

Abstract

N2O decomposition on an oxidized Rh catalyst (unsupported) has been studied using a tracer technique in order to reveal the reaction mechanism. N216O was pulsed onto an 18O/oxidized Rh catalyst at 493 K and desorbed O2 molecules were monitored. The 18O fraction in the desorbed oxygen had the same value as that on the surface oxygen. The result shows that the oxygen molecules do not desorb via the Eley-Rideal mechanism, but via the Langmuir-Hinshelwood mechanism. On the other hand, desorption of oxygen from Rh surfaces (in vacuum or in He) occurs at higher temperatures, which suggests reaction-assisted desorption of oxygen during the N2O decomposition reaction at low temperature.

Original languageEnglish
Pages (from-to)87-90
Number of pages4
JournalCatalysis Letters
Volume66
Issue number1-2
Publication statusPublished - 2000 May 1
Externally publishedYes

Keywords

  • NO decomposition
  • O isotope
  • Oxidized Rh catalyst
  • Reaction mechanism

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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    Uetsuka, H., Aoyagi, K., Tanaka, S., Yuzaki, K., Ito, S., Kameoka, S., & Kunimori, K. (2000). Isotopic study of nitrous oxide decomposition on an oxidized Rh catalyst: Mechanism of oxygen desorption. Catalysis Letters, 66(1-2), 87-90.