Formation and Migration of NCO Species on Ag/SiO2 Catalyst

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Abstract

The adsorption of HNCO has been investigated on Ag/SiO2 catalyst by means of FTIR spectroscopy. Adsorption of HNCO on the reduced sample at 190 K produced an absorption band at 2,170 cm-1 attributed to NCO bonded to Ag. Annealing the adsorbed layer under continuous degassing, the 2,170 cm-1 band gradually attenuated and at the same time a spectral feature at 2,300 cm-1 due to Si-NCO developed. From these spectral changes it was inferred that NCO bonded to Ag spilt over onto silica.

Original languageEnglish
Pages (from-to)101-104
Number of pages4
JournalCatalysis Letters
Volume116
Issue number3-4
DOIs
Publication statusPublished - Aug 1 2007

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Keywords

  • Ag/SiO catalyst
  • Formation of Ag-NCO
  • HNCO adsorption
  • Reduction of NO with ethanol
  • Spillover of NCO

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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