Emission FT-IR spectroscopic study of adsorbed carbon monoxide on metal powders and supported catalysts

J. Bódis, Cs Németh, J. Mink, G. Keresztury, P. Tétényi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Fourier transform infrared emission spectroscopy, FT-IRES, was used for the detection of adsorbed CO species at p = 40 mbar and T = 333-393 K on metal powders (Pt, Pd, Rh) and supported catalysts (Rh/activated carbon, 5% Rh). Linearly bonded CO features were detected at 2020 and 2030 cm-1 for Pd and Pt respectively. Bridged carbonyl species were also detected for Pd and Pt at 1930 and 1921 cm-1 respectively. The bands observed for Rh powder at 2040 and 1970 cm-1 have been assigned to symmetric and asymmetric stretchings of the geminal dicarbonyl, and the band at 1860 cm-1 is ascribed to the bridged carbonyl species. Similar bands, but about ten times weaker, have been observed for carbon supported Rh, and an extreme feature appeared at about 1800 cm-1 that might indicate the existence of three-fold bridged species.

Original languageEnglish
Pages (from-to)179-182
Number of pages4
JournalJournal of Molecular Structure
Volume410-411
DOIs
Publication statusPublished - Jan 1 1997

Keywords

  • Adsorbed CO species
  • Catalysts
  • FT-IRES spectroscopy

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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