期刊
INORGANIC CHEMISTRY FRONTIERS
卷 9, 期 12, 页码 2964-2968出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2qi00824f
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Deuterium solid-state MAS NMR spectroscopy is used to identify silanols and Bronsted acid sites in zeolites. The study shows a clear spectroscopic difference between zeolites with only silanols or both silanols and Bronsted acid sites compared to static H-2 NMR spectroscopic studies. This study highlights the versatility of solid-state MAS NMR spectroscopy and its synergy with IR spectroscopy in providing important information on zeolite properties.
Deuterium (H-2) solid-state MAS NMR spectroscopy is used for identifying both silanols and Bronsted acid sites in zeolites. The environments of hydroxyl groups in faujasite-type zeolites (FAU) with different aluminium contents and porosities in both acid- and sodium-forms were investigated. The results revealed a clear spectroscopic difference between zeolites possessing either silanols or both silanols and Bronsted acid sites compared to classical static H-2 NMR spectroscopic studies. This study reinforces the versatility of solid-state MAS NMR spectroscopy and its synergy with IR spectroscopy to provide critical information on zeolite properties, adding a new tool to the set of characterizations available for silanols and Bronsted acid sites.
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