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On the Nature and Accessibility of the Brønsted-Base Sites in Activated Hydrotalcite Catalysts

✍ Scribed by Winter, Ferry; Xia, Xinyu; Hereijgers, Bart P. C.; Bitter, Johannes H.; van Dillen, A. Jos; Muhler, Martin; de Jong, Krijn P.

Book ID
119956715
Publisher
American Chemical Society
Year
2006
Tongue
English
Weight
370 KB
Volume
110
Category
Article
ISSN
0022-3654

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H 2'AI and %i solid-state NMR was used to determine the geometry of the Brsnsted acid site in zeolites. The mean distance between acidic protons in bridging hydroxyl groups and the nearest framework Al atom is 2.38 ? 0.04 8, in zeolite H-Y and 2.48 2 0.04 A in H-ZSM-5. The quadrupole frequency of fr