کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
57547 | 47122 | 2008 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: N2O decomposition on Fe- and Co-ZSM-5: A density functional study N2O decomposition on Fe- and Co-ZSM-5: A density functional study](/preview/png/57547.png)
Density functional theory (DFT) calculations are employed to study N2O decomposition on relaxed [(SiH3)4AlO4M] (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 O2 desorption step is the rate-limiting step for both clusters. The activation barrier for the decomposition of the first N2O 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.
Journal: Catalysis Today - Volume 137, Issues 2–4, 30 September 2008, Pages 410–417