Infrared study of nitric oxide adsorbed on silica-supported chromia

The infrared spectrum of NO adsorbed on a 1.28% Cr sample supported on silica has bands at 1875, 1800, and 1745 cm −1. The 1875 and 1745 cm −1 bands behave as if they arise from one discrete species. These two bands behave as a pair when the chromia concentration is varied or when the adsorption tem...

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Bibliographic Details
Published in:Journal of catalysis 1975-01, Vol.36 (2), p.142-151
Main Authors: Kugler, E.L., Kokes, R.J., Gryder, J.W.
Format: Article
Language:English
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Summary:The infrared spectrum of NO adsorbed on a 1.28% Cr sample supported on silica has bands at 1875, 1800, and 1745 cm −1. The 1875 and 1745 cm −1 bands behave as if they arise from one discrete species. These two bands behave as a pair when the chromia concentration is varied or when the adsorption temperature is lowered to −78 °C. On the basis of the position and intensity of the two infrared bands, the surface species producing the spectrum is predicted to be an N 2O 2 dimer. The 1800 cm −1 infrared band behaves differently from the other two bands and is attributed to monomeric NO.
ISSN:0021-9517
1090-2694
DOI:10.1016/0021-9517(75)90019-6