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Three-Coordinate Aluminum in Zeolites Observed with In situ X-ray Absorption Near-Edge Spectroscopy at the Al K-Edge: Flexibility of Aluminum Coordinations in Zeolites
Open accessAbstract
Application of in situ X-ray absorption near-edge spectroscopy (XANES) at the Al K-edge provides unique insight into the flexibilty of the aluminum coordinations in zeolites as a function of treatment or during true reaction conditions. A unique, previously not observed, pre-edge feature is detected in zeolites H-Mordenite and steamed and unsteamed H-Beta at temperatures above 675 K. Spectra simulations using the full multiple scattering code Feff8 identify the unique pre-edge feature as three-coordinate aluminum. The amount of three-fold coordinated aluminum is a function of temperature and pretreatment of a zeolite: a steamed zeolite Beta contains more three-coordinate aluminum than an unsteamed sample. No clear differences between zeolites H-Mordenite and H-Beta were observed. Octahedrally coordinated aluminum forms in zeolites H-Mordenite and H-Beta at room temperature in a stream of wet helium. This octahedrally coordinated aluminum is unstable at temperatures higher than 395 K, where it quantitatively reverts to the tetrahedral coordination.
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Kuznicki, S. M., Bell, V. A., Nair, S., Hillhouse, H. W., Jacubinas, R. M., Braunbarth, C. M., Toby, B. H., & Tsapatsis, M. (2001) · Nature · doi:10.1038/35089052 · Cited by 616
Cited by
Challenges on molecular aspects of dealumination and desilication of zeolites
Silaghi, M.-C., Chizallet, C., & Raybaud, P. (2014) · Microporous and Mesoporous Materials · doi:10.1016/j.micromeso.2014.02.040 · Cited by 325
Engineering Zeolites for Catalytic Cracking to Light Olefins
Blay, V., Louis, B., Miravalles, R., Yokoi, T., Peccatiello, K. A., Clough, M., & Yilmaz, B. (2017) · ACS Catalysis · doi:10.1021/acscatal.7b02011 · Cited by 277
Quantitatively Probing the Al Distribution in Zeolites
Vjunov, A., Fulton, J. L., Huthwelker, T., Pin, S., Mei, D., Schenter, G. K., Govind, N., Camaioni, D. M., Hu, J. Z., & Lercher, J. A. (2014) · Journal of the American Chemical Society · doi:10.1021/ja501361v · Cited by 251
Zeolite (In)Stability under Aqueous or Steaming Conditions
Heard, C. J., Grajciar, L., Uhlík, F., Shamzhy, M., Opanasenko, M., Čejka, J., & Nachtigall, P. (2020) · Advanced Materials · doi:10.1002/adma.202003264 · Cited by 157
The effect of positioning cations on acidity and stability of the framework structure of Y zeolite
Deng, C., Zhang, J., Dong, L., Huang, M., Li, B., Jin, G., Gao, J., Zhang, F., Fan, M., Zhang, L., et al. (2016) · Scientific Reports · doi:10.1038/srep23382 · Cited by 98
Metadata
- Authors
- van Bokhoven, J. A., van der Eerden, A. M. J., & Koningsberger, D. C.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-05-23
- Volume
- 125
- Issue
- 24
- Pages
- 7435-7442
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2025721018
- Cited by
- 209
- References
- 2
- FWCI
- 6.44
- Type
- journal article
- Language
- en
- Open access
- green
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- van Bokhoven, J. A., van der Eerden, A. M. J., & Koningsberger, D. C. (2003). Three-Coordinate Aluminum in Zeolites Observed with In situ X-ray Absorption Near-Edge Spectroscopy at the Al K-Edge: Flexibility of Aluminum Coordinations in Zeolites. Journal of the American Chemical Society. https://doi.org/10.1021/ja0292905
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