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Carbon monoxide adsorption on alkali metal ion-exchanged ZSM-5 zeolites was investigated by IR spectroscopy. The IR peak positions and intensities of adsorbed CO, and the change in the spectra with temperature are discussed. The IR spectra for physisorbed CO over ZSM-5 zeolites were assigned to the oriented species on a cation, such as M+–C–O and M+–O–C, and the loosely adsorbed CO in the ZSM-5 pore.
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Katoh et al. (1994) studied this question.
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