Projects per year
Abstract
Aluminosilicate zeolites are traditionally used in high-temperature applications at low water vapour pressures where the zeolite framework is generally considered to be stable and static. Increasingly, zeolites are being considered for applications under milder aqueous conditions. However, it has not yet been established how neutral liquid water at mild conditions affects the stability of the zeolite framework. Here, we show that covalent bonds in the zeolite chabazite (CHA) are labile when in contact with neutral liquid water, which leads to partial but fully reversible hydrolysis without framework degradation. We present ab initio calculations that predict novel, energetically viable reaction mechanisms by which Al-O and Si-O bonds rapidly and reversibly break at 300 K. By means of solid-state NMR, we confirm this prediction, demonstrating that isotopic substitution of 17O in the zeolitic framework occurs at room temperature in less than one hour of contact with enriched water.
Original language | English |
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Article number | 4690 |
Number of pages | 7 |
Journal | Nature Communications |
Volume | 10 |
DOIs | |
Publication status | Published - 16 Oct 2019 |
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Dive into the research topics of 'Fast room temperature lability of aluminosilicate zeolites'. Together they form a unique fingerprint.Projects
- 2 Finished
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RS Wolfson Merit Award: Exploiting NMR spectroscopy: Local structure and disorder in solids
Ashbrook, S. E. (PI)
1/09/15 → 31/08/20
Project: Standard
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Profiles
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Russell Edward Morris, FRS FRSE FRSC FLSW
- School of Chemistry - Bishop Wardlaw Professor
- EaSTCHEM
Person: Academic
Datasets
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Fast Room Temperature Lability of Aluminosilicate Zeolites (dataset)
Heard, C. J. (Creator), Grajciar, L. (Creator), Rice, C. M. (Creator), Pugh, S. M. (Creator), Nachtigall, P. (Creator), Ashbrook, S. E. M. (Creator) & Morris, R. E. (Creator), University of St Andrews, 2019
DOI: 10.17630/31d75f26-ea55-42c9-9e06-c19bb4325200
Dataset
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