In:
Angewandte Chemie, Wiley, Vol. 134, No. 47 ( 2022-11-21)
Abstract:
Ammonia (NH 3 ) is an important chemical raw material and a unique carbon‐free fuel with high hydrogen energy density. Thus, NH 3 capture, storage, and desorption are of significant importance. However, high capacity capture, low energy desorption, and selective separation of NH 3 are still challengs so far. Here, we report high‐performance hybrid sorbents by anchoring LiCl in the nanopores of MIL‐53‐(OH) 2 metal–organic frameworks (MOFs). It is found that the optimal composite shows a capture capacity of 33.9 mmol g −1 NH 3 at 1.0 bar and 25 °C, which far exceeds the current record among the reported porous materials. Notably, the excellent capture capacity at low pressure and high temperature makes it possible to selectively capture NH 3 from NH 3 /N 2 , NH 3 /CO 2 , and NH 3 /H 2 O. It is revealed that synergistic action of NH 3 coordination to the highly dispersed Li + in the MOF nanopores and hydrogen bonding of NH 3 with Cl − account for such an excellent capture and selectivity performance.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v134.47
DOI:
10.1002/ange.202212032
Language:
English
Publisher:
Wiley
Publication Date:
2022
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