IR observation of activated ether species on acidic OH groups on H-ZSM-5 zeolites

R. Osuga, Toshiyuki Yokoi, Junko N. Kondo

研究成果: Article査読

4 被引用数 (Scopus)

抄録

IR spectra of ethers adsorbed on zeolite (H-ZSM-5) were analyzed in detail in comparison with those of water and alcohols. Interpretation of complicated features of IR spectra observed for adsorption of water and alcohols on acidic OH groups of zeolite is summarized in relation with the adsorption structure and the potential energy based on the accepted knowledge. Since the presence of Fermi resonance in vibrational modes between acidic OH groups and adsorbed species can be an estimate for the potential energy of the protonated transition state, IR spectra of adsorption of ethers on zeolite were interpreted by changing acidic OH groups to OD. Adsorption of ethers on silanol and acidic OH groups of zeolite resulted in markedly different IR spectra. In addition, the Fermi resonance between OH stretching of acidic OH (shifted below 2000 cm−1) and CH bending vibrations of adsorbed ethers was confirmed, and the observed adsorbed species were co-existent with protonated transition state in equilibrium at 298 K.

本文言語English
論文番号110535
ジャーナルMolecular Catalysis
477
DOI
出版ステータスPublished - 2019 10
外部発表はい

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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