29Si and 27Al MAS NMR investigation of H-mordenite dealuminated with phosgene

I. Hannus, A. Fonseca, I. Kiricsi, J. B. Nagy, P. Fejes

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

HM-MOR was dealuminated with phosgene between 673 and 973 K. Chemical analysis of samples combined with 27Al NMR and 29Si NMR data allowed us to quantify the Si/Al ratio, the concentration of extra-framework aluminium and framework vacancies. The 29Si NMR spectra reveal progressive dealumination with increasing temperature, accompanied by formation of SiCl and Si(OH)2 defect groups. The former yields quantitatively SiOH groups. The result showed unambiguously that framework reconstruction occurred during dealumination.

Original languageEnglish
Pages (from-to)155-162
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume94
Issue numberC
DOIs
Publication statusPublished - 1995

Fingerprint

Phosgene
phosgene
Nuclear magnetic resonance
nuclear magnetic resonance
Aluminum
chemical analysis
Vacancies
aluminum
Defects
defects
Chemical analysis
mordenite
Temperature
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Catalysis
  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

29Si and 27Al MAS NMR investigation of H-mordenite dealuminated with phosgene. / Hannus, I.; Fonseca, A.; Kiricsi, I.; Nagy, J. B.; Fejes, P.

In: Studies in Surface Science and Catalysis, Vol. 94, No. C, 1995, p. 155-162.

Research output: Contribution to journalArticle

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AU - Fejes, P.

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