Hydrogen storage in metal–organic frameworks

Murray, Leslie J.; Dincă, Mircea; Long, Jeffrey R.

doi:10.1039/b802256a

Cited by 4,275 publications

(2,254 citation statements)

References 182 publications

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“…63 Further information regarding the properties of sorbents for hydrogen storage (via physisorption or spillover) can be found elsewhere. 62,[64][65][66] …”

Section: Complex Hydridesmentioning

confidence: 99%

High capacity hydrogenstorage materials: attributes for automotive applications and techniques for materials discovery

et al. 2010

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Widespread adoption of hydrogen as a vehicular fuel depends critically upon the ability to store hydrogen on-board at high volumetric and gravimetric densities, as well as on the ability to extract/insert it at sufficiently rapid rates. As current storage methods based on physical means-high-pressure gas or (cryogenic) liquefaction-are unlikely to satisfy targets for performance and cost, a global research effort focusing on the development of chemical means for storing hydrogen in condensed phases has recently emerged. At present, no known material exhibits a combination of properties that would enable high-volume automotive applications. Thus new materials with improved performance, or new approaches to the synthesis and/or processing of existing materials, are highly desirable. In this critical review we provide a practical introduction to the field of hydrogen storage materials research, with an emphasis on (i) the properties necessary for a viable storage material, (ii) the computational and experimental techniques commonly employed in determining these attributes, and (iii) the classes of materials being pursued as candidate storage compounds. Starting from the general requirements of a fuel cell vehicle, we summarize how these requirements translate into desired characteristics for the hydrogen storage material. Key amongst these are: (a) high gravimetric and volumetric hydrogen density, (b) thermodynamics that allow for reversible hydrogen uptake/release under near-ambient conditions, and (c) fast reaction kinetics. To further illustrate these attributes, the four major classes of candidate storage materials-conventional metal hydrides, chemical hydrides, complex hydrides, and sorbent systems-are introduced and their respective performance and prospects for improvement in each of these areas is discussed. Finally, we review the most valuable experimental and computational techniques for determining these attributes, highlighting how an approach that couples computational modeling with experiments can significantly accelerate the discovery of novel storage materials (155 references).

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“…63 Further information regarding the properties of sorbents for hydrogen storage (via physisorption or spillover) can be found elsewhere. 62,[64][65][66] …”

Section: Complex Hydridesmentioning

confidence: 99%

High capacity hydrogenstorage materials: attributes for automotive applications and techniques for materials discovery

et al. 2010

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“…Whereas some metal and complex hydrides can store large quantities of hydrogen, the extraction of the gas from the solid (reversibly) is not possible under the typical operating conditions of polymer electrolyte membrane (PEM) fuel cells; the interaction between the “host” and the chemically bound H is enthalpically too strong 2. In contrast, readily reversible materials based on physical H absorption, such as metal– organic or covalent organic frameworks (MOFs or COFs, respectively) typically exhibit low hydrogen capacities under ambient (or above ambient) temperature 3, 4. A state‐of‐the‐art framework material for hydrogen storage such as MOF 177, for instance, has a hydrogen storage capacity of 7.5 wt % at 77 K and 70 bar, whereas the storage capacity at ambient pressure is significantly lower (1 wt %) 5.…”

Section: Introductionmentioning

confidence: 99%

Facile Uptake and Release of Ammonia by Nickel Halide Ammines

et al. 2016

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Although major difficulties are experienced for hydrogen‐ storage materials to meet performance requirements for mobile applications, alternative fuel cell feedstocks such as ammonia can be stored in the solid state safely at high capacity. We herein describe the NiX2‐NH3 (X=Cl, Br, I) systems and demonstrate their exceptional suitability for NH3 storage (up to 43 wt % NH3 with desorption that begins at 400 K). The structural effects that result from the uptake of NH3 were studied by powder X‐ray diffraction (PXD), FTIR spectroscopy and SEM. NH3 release at elevated temperatures was followed by in situ PXD. The cycling capabilities and air stability of the systems were also explored. NH3 is released from the hexaammines in a three‐step process to yield the diammine, monoammine and NiX2 dihalides respectively and (re)ammoniation occurs readily at room temperature. The hexaammines do not react with air after several hours of exposure.

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“…As mentioned above, MOFs are inorganic-organic solids that form porous crystalline structures and can be synthesized by using a wide range of metal ions and organic ligands [200]. Because of their unique properties, MOFs were increasingly used recently as SPSs.…”

Section: Metal-organic Framework As Solid-phase Sorbentsmentioning

confidence: 99%

Recent advances in solid-phase sorbents for sample preparation prior to chromatographic analysis

Wen

Chen

et al. 2014

TrAC Trends in Analytical Chemistry

342

123

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A B S T R A C TSample preparation is a crucial bottleneck in the whole analytical process. Solid-phase sorbents (SPSs) have aroused increasing interest in research on sample preparation, as they have key roles in obtaining high clean-up and enrichment efficiency in the analysis of trace targets present in complex matrices. The objective of this review is to provide a broad overview of the recent advances and applications of SPSs in sample preparation prior to chromatographic analysis, during the period 2008-13. We include SPSs, such as molecularly-imprinted polymers, carbon nanomaterials, metallic nanoparticles and metal organic frameworks, focusing on solid-phase extraction, solid-phase microextraction, matrix solid-phase dispersion and stir-bar sorptive extraction of typical pollutants in environmental, biological, food and pharmaceutical samples. We propose remaining challenges and future perspectives to improve development of new SPSs and to apply them further.

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Hydrogen storage in metal–organic frameworks

Cited by 4,275 publications

References 182 publications

High capacity hydrogenstorage materials: attributes for automotive applications and techniques for materials discovery

High capacity hydrogenstorage materials: attributes for automotive applications and techniques for materials discovery

Facile Uptake and Release of Ammonia by Nickel Halide Ammines

Recent advances in solid-phase sorbents for sample preparation prior to chromatographic analysis

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