Atomic locations and adsorbate interactions of Al single and pair sites in H-ZSM-5 zeolite
Hong Kong Polytechnic University · University of Oxford · +4 more institutions
Abstract
The distribution of substitutional aluminum (Al) atoms in zeolites affects molecular adsorbate geometry, catalytic activity, and shape and size selectivity. Accurately determining Al positions has been challenging. We used synchrotron resonant soft x-ray diffraction (RSXRD) at multiple energies near the Al K-edge combined with molecular adsorption techniques to precisely locate “single Al” and “Al pairs” in a commercial H-ZSM-5 zeolite. This analysis depicts three distinct Al tetrahedral (T) sites: T8, T6, and T4. A combined suite of characterizations, including ammonia temperature-dependent desorption, neutron powder diffraction, solid-state nuclear magnetic resonance spectroscopy, and density functional…
Citation impact
- FWCI
- 24.01
- Percentile
- 100%
- References
- 79
Authors
13- GLGuangchao LiCorresponding
Hong Kong Polytechnic University, University of Oxford
- CFChristopher FooCorresponding
Rutherford Appleton Laboratory, Diamond Light Source, University of Oxford
- RFR. Fan
Rutherford Appleton Laboratory, Diamond Light Source
- MZMingji Zheng
Wuhan Institute of Physics and Mathematics, University of Chinese Academy of Sciences
- QWQiang Wang
Wuhan Institute of Physics and Mathematics, University of Chinese Academy of Sciences
Topics & keywords
- Zeolite
- Adsorption
- Neutron diffraction
- Chemistry
- Diffraction
- Crystallography
- ZSM-5
- Powder diffraction