IR spectra of NO and NO+CO mixtures adsorbed on Fe2O3

The interaction of NO and NO+CO mixtures with Fe2O3 has been studied by IR spectroscopy. The conclusion has been made that adsorption bands in the region of 1200–1700 cm−1 belong to nitrite-nitrate structures, the band at 1810 cm−1 characterizes catalytically active particles of NO adsorbed on reduced surface sites, Fe2+, the bands at 2210 and 2240 cm−1 are due to vibrations of gaseous N2O.