Quantitatively Probing the Al Distribution in Zeolites

• Published in: Journal of the American Chemical Society Vol. 136; no. 23; pp. 8296 - 8306
• Main Authors: Vjunov, Aleksei, Fulton, John L, Huthwelker, Thomas, Pin, Sonia, Mei, Donghai, Schenter, Gregory K, Govind, Niranjan, Camaioni, Donald M, Hu, Jian Zhi, Lercher, Johannes A
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 11.06.2014
• Subjects: absorption; aluminum; catalysts; geometry; ion exchange; molecular dynamics; nuclear magnetic resonance spectroscopy; quantitative analysis; stable isotopes; X-radiation; zeolites

The degree of substitution of Si4+ by Al3+ in the oxygen-terminated tetrahedra (Al T-sites) of zeolites determines the concentration of ion-exchange and Brønsted acid sites. Because the location of the tetrahedra and the associated subtle variations in bond angles influence the acid strength, quanti...