The Mechanism of N2O Decomposition on Fe-ZSM-5: An Isotope Labeling Study

Author: Pirngruber Gerhard D.   Roy Pijus K.  

Publisher: Springer Publishing Company

ISSN: 1011-372X

Source: Catalysis Letters, Vol.93, Iss.1-2, 2004-03, pp. : 75-80

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Abstract

The mechanism of N2O decomposition over an 18O-labeled Fe-ZSM-5 catalyst was studied. The isotope distribution of the O2 produced during N2O decomposition was statistical. This shows that O2 was formed from a pool of equilibrated surface oxygen atoms. The size of the pool was 1.0 O/Fe, i.e. most or all of the iron clusters took part in the reaction. The reactivity of the oxygen atoms in the pool was low. They did not exchange with 18O2 to a significant extent.