Spectroscopic behavior in the adsorption of CO-Cl₂ mixtures on NaY-FAU zeolite

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• 作者：Bodlaki ; Dó ; ra ; Kó ; nya ; Zoltá ; n ; Hannus ; Istvá ; n ; Kiricsi ; Imre
• 关键词：CO-Cl₂ adsorption ; Phosgene ; Infrared spectroscopy ; Fermi resonance ; Zeolite
• 刊名：Vibrational Spectroscopy
• 出版年：1997
• 出版时间：August, 1997
• 年：1997
• 卷：15
• 期：1
• 页码：37-42
• 全文大小：383 K

文摘

Fourier transform infrared spectroscopy was applied for a systematic investigation of the adsorption of gaseous CO-Cl₂ gas mixtures on NaY-FAU zeolite. A doublet of Fermi resonance due to the phosgene (COCl₂) molecule on the surface was detected independently of the sequence of adsorption of the reactants. When Cl₂ was adsorbed on a sample already loaded with CO, the Fermi doublet was accompanied by several additional new bands. A sharp band due to adsorbed CO₂ was also detected. These bands disappeared on heat treatment at 400 K and only the Fermi doublet remained. With the reverse sequence of adsorption, only the Fermi doublet was detected at room temperature. Experiments with ¹³CO revealed the Fermi doublet at lower wavenumbers. The calculated resonance parameters indicated the Fermi resonance was stronger.