FTIR study of the adsorption of ammonia and pyridine on V2O5/MgO catalysts

Akcay M., Yurdakoc M. K., Tonbul Y., Yurdakoc K., Honicke D.

SPECTROSCOPY LETTERS, vol.31, no.8, pp.1719-1732, 1998 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 8
  • Publication Date: 1998
  • Doi Number: 10.1080/00387019808007448
  • Journal Name: SPECTROSCOPY LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1719-1732
  • Keywords: V2O5/MgO catalysts, pyridine and ammonia adsorption, Bronsted and Lewis acid sites, FT-IR
  • Dokuz Eylül University Affiliated: No

Abstract

The adsorption of ammonia and pyridine on the surface of the V2O5/MgO catalysts has been studied for the determination of the Bronsted and Lewis acid sites. The data showed that the catalysts have medium Lewis acidity, but are also weak Bronsted acids, having active hydroxy groups able to interact with pyridine by H-bonding and by protonation. Pyridine is a suitable basic probe for the quantification of the catalysts. 32% V2O5/MgO catalyst is the most acidic catalyst.