A density functional theory study of oxidation of benzene to phenol by N2O on Fe- and Co-ZSM-5 clusters


Fellah M. F. , ÖNAL I.

TURKISH JOURNAL OF CHEMISTRY, cilt.33, ss.333-345, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 33 Konu: 3
  • Basım Tarihi: 2009
  • Doi Numarası: 10.3906/kim-0809-24
  • Dergi Adı: TURKISH JOURNAL OF CHEMISTRY
  • Sayfa Sayıları: ss.333-345

Özet

Density functional theory (DFT) calculations were carried out in the study of oxidation of benzene to phenol by N2O on relaxed [(SiH3)(4)AlO4M] (where M=Fe, Co) cluster models representing Fe- and Co-ZSM-5 surfaces. The catalytic cycle steps are completed for both Fe-ZSM-5 and Co-ZSM-5 clusters. The general trend of the results that were obtained in terms of activation barriers for the Fe-ZSM-5 cluster is in agreement with the experimental and theoretical literature. It was observed that the phenol formation step is the rate-limiting step for both clusters and Co-ZSM-5 surface has a lower activation barrier than the Fe-ZSM-5 surface (i.e. 35.82 kcal/mol vs. 45.59 kcal/mol, respectively).