Mechanism of decomposition of surface ethoxy species to ethene and acidic OH groups on H-ZSM-5

Junko N. Kondo, Hiroshi Yamazaki, Ryota Osuga, Toshiyuki Yokoi, Takashi Tatsumi

研究成果: Article査読

20 被引用数 (Scopus)

抄録

The reaction mechanism of the decomposition of ethoxy species to ethene and acidic OH groups on H-ZSM-5 was studied by IR spectroscopy using isotope-labeled ethanol. The concerted mechanism occurring on both the ethoxy (acid) site and the counterpart lattice oxygen was suggested by GC-MS analysis of evolved d2-ethene and IR observation of the recovery of OH s groups on acid sites from the decomposition of CH3CD2O- ethoxy species. The concerted mechanism was further confirmed by the estimation of activation energy for decomposition of CH3CH2O-, CH3CD2O-, and CD3CD2O- ethoxy species, 122 ± 3, 125 ± 3, and 140 ± 5 kJ mol-1, respectively, where the kinetic isotope effect was observed for the cleavage of the CH or CD bond of the methyl group of the ethoxy species.

本文言語English
ページ(範囲)2243-2246
ページ数4
ジャーナルJournal of Physical Chemistry Letters
6
12
DOI
出版ステータスPublished - 2015 6 18
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 物理化学および理論化学

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