FT-IR study of the surface redox states on platinum-potassium-alumina catalysts

Tania Montanari, Roberto Matarrese, Nancy Artioli, Guido Busca*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Pt-K/Al2O3 (Pt 1%; K 5.4% wt/wt) catalyst active for the simultaneous Diesel particulate oxidation and NOx reduction have been characterized in comparison with 1% Pt/Al2O3 catalyst. IR spectra of adsorbed CO at -140°C and at room temperature allowed the detection of oxidized Pt centers and of their very strong oxidizing ability. TPD and IR spectra of adsorbed CO2 allowed to characterize the basicity of the samples. The data indicate that Pt centers lie in close proximity of potassium oxide species generating basicity.

Original languageEnglish
Pages (from-to)15-23
Number of pages9
JournalApplied Catalysis B: Environmental
Volume105
Issue number1-2
DOIs
Publication statusPublished - 09 Jun 2011
Externally publishedYes

Keywords

  • Adsorbed CO
  • Catalytic combustion
  • IR spectroscopy
  • Nanoparticles
  • NOx adsorption and reduction
  • Platinum
  • Potassium alumina
  • Supported Pt catalysts

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Environmental Science(all)

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