Affordable Access

Publisher Website

N2O decomposition on Fe- and Co-ZSM-5: A density functional study

Authors
Journal
Catalysis Today
0920-5861
Publisher
Elsevier
Publication Date
Volume
137
Identifiers
DOI: 10.1016/j.cattod.2007.10.114
Keywords
  • Dft
  • Fe-Zsm-5
  • Co-Zsm-5
  • N2O Decomposition
  • Channel Effect

Abstract

Abstract Density functional theory (DFT) calculations are employed to study N 2O decomposition on relaxed [(SiH 3) 4AlO 4M] (where M = Fe, Co) cluster models representing Fe- and Co-ZSM-5 surfaces and Fe-ZSM-5 channel cluster. The catalytic cycle steps are completed both for Fe- and Co-ZSM-5 clusters. It is found that the general trend of the results obtained is in agreement with experimental and theoretical literature: Co-ZSM-5 has a lower activation energy barrier than Fe-ZSM-5 and O 2 desorption step is the rate-limiting step for both clusters. The activation barrier for the decomposition of the first N 2O molecule inside a Fe-ZSM-5 channel cluster increases in comparison with that of the cluster model indicating a channel effect on the activation barrier. The activation barrier reported for the channel cluster is 12.63 kcal/mol. This is also in good agreement with experimental literature.

There are no comments yet on this publication. Be the first to share your thoughts.