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- W2005940960 abstract "The adsorption of CO on a 5% Pt/SiO2 catalyst has been studied using infrared spectroscopy. Spectra obtained under different conditions showed the presence of two distinct adsorbed CO species. The high-frequency infrared band centered at 2070 cm− (Θ296k = 0.35) was assigned to the stretching frequency of CO linearly adsorbed on Pt. These adsorptive CO molecules were characterized as having a nonordered structure with large dipole-dipole interactions. The low-frequency infrared band centered at 2047 cm− (Θ = 0.35) was assigned to the stretching frequency of desorptive CO with ordered structure adsorbed on Pt surface sites having a low surface coordination. Dipole-dipole interaction for CO molecules adsorbed on these surface sites was small. Adsorption-desorption hysteresis curves suggested that the CO coverage-dependent shifts were due to an adsorbed disordered-ordered transition when a migration occurred from low Miller index planes to high Miller index planes. By carefully controlling the adsorption-desorption conditions, it was possible to obtain a CO doublet at 2070 and 2049 cm− indicating that both ordered and disordered CO could coexist on silica-supported Pt surface. The relative intensities of the adsorbed CO species suggested that the ordered structure had a higher extinction coefficient than the disordered CO structure." @default.
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- W2005940960 title "Investigation of interactions between metals and adsorbed organic compounds by infrared spectroscopic study of adsorbed CO I. Infrared study of CO adsorption and desorption on Pt/Cab-O-Sil catalyst" @default.
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- W2005940960 doi "https://doi.org/10.1016/0021-9517(81)90005-1" @default.
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