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Metal–Inorganic–Organic Matrices as Efficient Sorbents for Hydrogen Storage
Author(s) -
Azzouz Abdelkrim,
Nousir Saadia,
Bouazizi Nabil,
Roy René
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201402958
Subject(s) - hydrogen , hydrogen storage , chemistry , metal , chemical engineering , adsorption , inorganic chemistry , organic chemistry , engineering
Stabilization of metal nanoparticles (MNPs) without re‐aggregation is a major challenge. An unprecedented strategy is developed for achieving high dispersion of copper(0) or palladium(0) on montmorillonite‐supported diethanolamine or thioglycerol. This results in novel metal–inorganic–organic matrices (MIOM) that readily capture hydrogen at ambient conditions, with easy release under air stream. Hydrogen retention appears to involve mainly physical interactions, slightly stronger on thioglycerol‐based MIOM (S‐MIOM). Thermal enhancement of desorption suggests also a contribution of chemical interactions. The increase of hydrogen uptake with prolonged contact times arises from diffusion hindrance, which appears to be beneficial by favoring hydrogen entrapment. Even with compact structures, MIOMs act as efficient sorbents with much higher efficiency factor (1.14–1.17 mmol H 2 m −2 ) than many other sophisticated adsorbents reported in the literature. This opens new prospects for hydrogen storage and potential applications in microfluidic hydrogenation reactions.