H-MOR: Density functional investigation for the relative strength of Brønsted acid sites and dynamics simulation of NH3 protonation-deprotonation

M. Elanany, D. P. Vercauteren, M. Koyama, M. Kubo, P. Selvam, E. Broclawik, A. Miyamoto

研究成果: Article査読

17 被引用数 (Scopus)

抄録

The adsorption energies of NH3 at different positions in acidic mordenite, viz., main channel, side pocket, and double four-membered rings, are investigated using periodic density functional theory method. Furthermore, for the first time, the dynamic behavior of NH3 interacting with Brønsted acid site in the main channel has been monitored. The results reveal that the adsorption energies of ammonia on Brønsted acid sites in the main channel (T4, T2, and T1) are higher than that in the side pocket (T3). Consequently, the strength of Brønsted acid sites follows the same order. Ammonia dynamics results show that the protons are in continuous transfer, where NH3 acts as a bridge for transferring protons in between ammonium ion and framework oxygen ions.

本文言語English
ページ(範囲)1-7
ページ数7
ジャーナルJournal of Molecular Catalysis A: Chemical
243
1
DOI
出版ステータスPublished - 2006 1 2

ASJC Scopus subject areas

  • 触媒
  • プロセス化学およびプロセス工学
  • 物理化学および理論化学

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