SURFACE CHEMICAL STRUCTURES OF V//2O//5-P//2O//5 CATALYSTS.

Atsushi Satsuma, Atsushi Hattori, Akio Furuta, Akira Miyamoto, Tadashi Hattori, Yuichi Murakami

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Surface chemical structures of V//2O//5-P//2O//5 catalysts were investigated by using X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS), temperature-programmed desorption (TPD) of NH//3, infrared spectra of adsorbed NH//3 and pyridine, and the NARP (nitric oxide-ammonia rectangular pulse) technique. The concentration of the surface V equals O species remarkably increased with P//2O//5 content below P/V equals 1. 0, but it decreased on further addition of P//2O//5. The increase in the surface V equals O species was attributed to the lower oxidation state of vanadium ions in the bulk of the V//2O//5-P//2O//5 catalysts. The addition of P//2O//5 increased the surface concentration and the strength of acid sites, which consist mostly of Bronsted acid sites and of a slight amount of Lewis acid sites.

Original languageEnglish
Pages (from-to)2275-2282
Number of pages8
JournalJournal of physical chemistry
Volume92
Issue number8
Publication statusPublished - 1988 Jan 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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    Satsuma, A., Hattori, A., Furuta, A., Miyamoto, A., Hattori, T., & Murakami, Y. (1988). SURFACE CHEMICAL STRUCTURES OF V//2O//5-P//2O//5 CATALYSTS. Journal of physical chemistry, 92(8), 2275-2282.