The nature of the surface site for isocyanate produced in the reaction of ammonia and carbon monoxide over supported catalysts

The reaction of CO and NH 3 was performed over M/X (M=Rh, Ru, Pd; X=Al 2O 3, SiO 2, TiO 2) films. Infrared spectroscopy was used to monitor the formation of surface intermediates. Isocyanate (NCO) was detected for all of the metals when the support was Al 2O 3 or SiO 2, but not for TiO 2. The NCO re...

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Bibliographic Details
Published in:Chemical physics letters 1989-08, Vol.160 (5), p.559-563
Main Authors: Paul, D.K., Worley, S.D., Hoffman, N.W., Ash, D.H., Gautney, J.
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The reaction of CO and NH 3 was performed over M/X (M=Rh, Ru, Pd; X=Al 2O 3, SiO 2, TiO 2) films. Infrared spectroscopy was used to monitor the formation of surface intermediates. Isocyanate (NCO) was detected for all of the metals when the support was Al 2O 3 or SiO 2, but not for TiO 2. The NCO resided on the Al 2O 3 support for all M/Al 2O 3 catalysts, but on the metal when the support was SiO 2. It was concluded that the formation and location of the NCO was dependent upon the extent of NH 4 + formation on the various supports.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(89)80063-6