Observation of cyanate and isocyanate surface species during the reaction of ammonia and carbon monoxide over supported rhodium

Observation of cyanate and isocyanate surface species during the reaction of ammonia and carbon monoxide over supported rhodium

The reaction of CO with NH{sub 3} over preoxidized Rh/SiO{sub 2} has been studied by infrared spectroscopy to detect surface intermediates. Two of the surface species having infrared bands at 2172 and 2225 cm{sup {minus}1} have been identified as RhNCO and RhOCN, respectively. This is likely the fir...

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Veröffentlicht in:Journal of physical chemistry (1952) 1989-06, Vol.93 (11), p.4598-4603
Hauptverfasser: Paul, D. K, McKee, M. L, Worley, S. D, Hoffman, N. W, Ash, D. H, Gautney, J
Format: Artikel
Sprache:eng
Schlagworte:
AMMONIA
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONIC ACID DERIVATIVES
Catalysis
Catalysts: preparations and properties
Catalytic reactions
CHALCOGENIDES
CHEMICAL REACTIONS
Chemistry
CYANAMIDES
DATA
DATA ANALYSIS
ELEMENTS
Exact sciences and technology
EXPERIMENTAL DATA
General and physical chemistry
General. Nomenclature, chemical documentation, computer chemistry
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
INFRARED SPECTRA
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
RHODIUM
SILICON COMPOUNDS
SILICON OXIDES
SPECTRA
SYNTHESIS
Theory of reactions, general kinetics
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
TRANSITION ELEMENTS 400201 > Chemical & Physicochemical Properties
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Zusammenfassung:The reaction of CO with NH{sub 3} over preoxidized Rh/SiO{sub 2} has been studied by infrared spectroscopy to detect surface intermediates. Two of the surface species having infrared bands at 2172 and 2225 cm{sup {minus}1} have been identified as RhNCO and RhOCN, respectively. This is likely the first observation of these two surface species simultaneously on a supported transition-metal catalyst. High-quality ab initio computations have been employed to aid in the band assignments.
ISSN:0022-3654
1541-5740
DOI:10.1021/j100348a039