Journal
NATURE COMMUNICATIONS
Volume 11, Issue 1, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-020-17470-4
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Funding
- National Natural Science Foundation of China [91745111, U1932218, 22061130202, 21733013, 21872170]
- key program for frontier science of the Chinese Academy of Sciences [QYZDB-SSW-SLH027]
- Key projects of international partnership plan for foreign cooperation [112942KYSB20180009]
- Hubei Provincial Natural Science Foundation [2017CFA032]
- Youth Innovation Promotion Association, Chinese Academy of Sciences
- National Science Foundation [NSF/DMR-1644779]
- State of Florida
- NSF [DMR-1039938, DMR-0603042]
- NIH [P41 GM122698]
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gamma-Al2O3 is one of the most widely used catalysts or catalyst supports in numerous industrial catalytic processes. Understanding the structure of gamma-Al2O3 is essential to tuning its physicochemical property, which still remains a great challenge. We report a strategy for the observation and determination of oxygen structure of gamma-Al2O3 by using two-dimensional (2D) solid-state NMR spectroscopy at high field. 2D O-17 double-quantum single-quantum homonuclear correlation NMR experiment is conducted at an ultra-high magnetic field of 35.2 T to reveal the spatial proximities between different oxygen species from the bulk to surface. Furthermore, 2D proton-detected H-1-O-17 heteronuclear correlation NMR experiments allow for a rapid identification and differentiation of surface hydroxyl groups and (sub-)surface oxygen species. Our experimental results demonstrate a non-random distribution of oxygen species in gamma-Al2O3.
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