Infrared spectroscopic study of isocyanate formation in the reaction of NO and CO over Cr2O3/Al2O3 and Cr2O3/SiO2

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Abstract

The formation of an isocyanate complex in the NO + CO reaction on alumina- and silica-supported chromia was investigated by infrared spectroscopy. Isotopically-labelled gases were used to confirm that the bands at 2262 and 2242 cm-1 on Cr2O3/Al2O3 are due to surface isocyanate. The effects of the experimental conditions on the intensities of the above bands were investigated in detail. Isocyanate on Cr2O3/SiO2 yielded bands at 2315 and 2210 cm-1. The band at 2210 cm-1 was assigned to Cr2+-NCO, while the bands at 2262 and 2242 cm-1 and that at 2315 cm-1 were attributed to the isocyanate complex residing on alumina and silica, respectively.

Original languageEnglish
Pages (from-to)2383-2395
Number of pages13
JournalJournal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
Volume76
DOIs
Publication statusPublished - Dec 1 1980

ASJC Scopus subject areas

  • Chemistry(all)

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