Surface structure and catalytic performance of niobium oxides supported on titania

Thomas Onfroy, Olga V. Manoilova, Saeed B. Bukallah, David M. Hercules, Guillaume Clet, Marwan Houalla

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


The surface structure and activity of catalytic systems based on niobium oxide supported on titania were investigated. A series of catalysts with Nb content up to 3.6 atoms/nm2 was prepared by incipient wetness impregnation of the titania support with niobium oxalate solutions. Characterization of the system by X-ray diffraction (XRD) and Raman spectroscopy studies did not show evidence of niobium oxide formation. Surface analysis was performed by X-ray photoelectron spectroscopy (XPS), ion scattering spectroscopy (ISS), Raman and infrared spectroscopy. These results were correlated with Brønsted acidity and catalytic activity determined in our previous study. A direct correlation between the catalytic activity and the abundance of Brønsted acid sites had been observed. Analysis of the surface structure by infrared spectroscopy showed a similar evolution for the intensity of the band attributed to polymerized NbOx.

Original languageEnglish
Pages (from-to)184-190
Number of pages7
JournalApplied Catalysis A: General
Issue number2
Publication statusPublished - Jan 10 2007


  • Brønsted acidity
  • Infrared spectroscopy
  • Propanol dehydration
  • Raman spectroscopy
  • Surface analysis
  • Titania-supported niobium oxide

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology


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