Formation and migration of NCO species on Ag/SiO2 catalyst

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 gra...

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Published in:Catalysis letters 2007-08, Vol.116 (3-4), p.101-104
Main Authors: KECSKEMETI, Anita, BANSAGI, Tamas, SOLYMOSI, Frigyes
Format: Article
Language:English
Subjects:
Absorption spectra
Adsorption
Catalysis
Catalysts
Chemistry
Continuous annealing
Exact sciences and technology
General and physical chemistry
Migration
Silicon dioxide
Stream degassing
Surface physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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description 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.
doi_str_mv 10.1007/s10562-007-9153-2
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subjects Absorption spectra
Adsorption
Catalysis
Catalysts
Chemistry
Continuous annealing
Exact sciences and technology
General and physical chemistry
Migration
Silicon dioxide
Stream degassing
Surface physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
title Formation and migration of NCO species on Ag/SiO2 catalyst
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