Efficient capture and storage of ammonia in robust aluminium-based metal-organic frameworks

The development of stable sorbent materials to deliver reversible adsorption of ammonia (NH ) is a challenging task. Here, we report the efficient capture and storage of NH in a series of robust microporous aluminium-based metal-organic framework materials, namely MIL-160, CAU-10-H, Al-fum, and MIL-...

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Published inCommunications chemistry Vol. 6; no. 1; p. 55
Main Authors Guo, Lixia, Hurd, Joseph, He, Meng, Lu, Wanpeng, Li, Jiangnan, Crawshaw, Danielle, Fan, Mengtian, Sapchenko, Sergei, Chen, Yinlin, Zeng, Xiangdi, Kippax-Jones, Meredydd, Huang, Wenyuan, Zhu, Zhaodong, Manuel, Pascal, Frogley, Mark D, Lee, Daniel, Schröder, Martin, Yang, Sihai
Format Journal Article
LanguageEnglish
Published England Nature Publishing Group 24.03.2023
Nature Publishing Group UK
Nature Portfolio
Subjects
Adsorption
Aluminum
Ammonia
Binding sites
Infrared spectroscopy
Metal-organic frameworks
Neutron diffraction
NMR
NMR spectroscopy
Nuclear magnetic resonance
Robustness
Solid state
Sorbents
Spectrum analysis
Storage capacity
Synchrotrons
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Summary:The development of stable sorbent materials to deliver reversible adsorption of ammonia (NH ) is a challenging task. Here, we report the efficient capture and storage of NH in a series of robust microporous aluminium-based metal-organic framework materials, namely MIL-160, CAU-10-H, Al-fum, and MIL-53(Al). In particular, MIL-160 shows high uptakes of NH of 4.8 and 12.8 mmol g at both low and high pressure (0.001 and 1.0 bar, respectively) at 298 K. The combination of in situ neutron powder diffraction, synchrotron infrared micro-spectroscopy and solid-state nuclear magnetic resonance spectroscopy reveals the preferred adsorption domains of NH molecules in MIL-160, with H/D site-exchange between the host and guest and an unusual distortion of the local structure of [AlO ] moieties being observed. Dynamic breakthrough experiments confirm the excellent ability of MIL-160 to capture of NH with a dynamic uptake of 4.2 mmol g at 1000 ppm. The combination of high porosity, pore aperture size and multiple binding sites promotes the significant binding affinity and capacity for NH , which makes it a promising candidate for practical applications.
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ISSN:2399-3669
2399-3669
DOI:10.1038/s42004-023-00850-4