Adsorption and reaction of formaldehyde on TiO2-supported Rh catalysts studied by FTIR and mass spectrometry

J. Raskó, T. Kecskés, J. Kiss

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

The adsorption and surface reactions of formaldehyde were studied on TiO2 and Rh/TiO2 catalysts at 300-473 K by Fourier-transform infrared spectroscopy (FTIR) and mass spectrometry (MS). FTIR bands due to molecularly adsorbed formaldehyde, formate, and formic acid were detected. The dominant surface species was dioxymethylene (DOM, H 2CO2(a)) species, a part of which underwent surface polymerization resulting in polyoxymethylene (POM) on the surface. At higher temperatures molecularly adsorbed formaldehyde and DOM surface species decompose producing mainly H2 and CO in the gas phase. The amounts of H 2 and CO were proportional with the Rh content of the catalysts. The quantity of ethylene (also formed in the above decomposition), however, changed inversely with the increase of Rh content.

Original languageEnglish
Pages (from-to)183-191
Number of pages9
JournalJournal of Catalysis
Volume226
Issue number1
DOIs
Publication statusPublished - Aug 15 2004

Fingerprint

formic acid
formaldehyde
Catalyst supports
Formaldehyde
Fourier transform infrared spectroscopy
Mass spectrometry
mass spectroscopy
2,5-Dimethoxy-4-Methylamphetamine
infrared spectroscopy
Adsorption
catalysts
adsorption
Carbon Monoxide
acids
Catalysts
Formic acid
formates
Surface reactions
surface reactions
Ethylene

Keywords

  • Formaldehyde adsorption and reaction
  • FTIR
  • MS
  • TiO and Rh/TiO catalysts

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Adsorption and reaction of formaldehyde on TiO2-supported Rh catalysts studied by FTIR and mass spectrometry. / Raskó, J.; Kecskés, T.; Kiss, J.

In: Journal of Catalysis, Vol. 226, No. 1, 15.08.2004, p. 183-191.

Research output: Contribution to journalArticle

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