Hydrogen Storage in Metal−Organic Frameworks by Bridged Hydrogen Spillover

Li, Yingwei; Yang, Ralph T.

doi:10.1021/ja061681m

Cited by 477 publications

(454 citation statements)

References 18 publications

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“…63 While the specific nature and mechanism of spillover is not yet definitively understood, reversible room-temperature uptake and release have been reported in spillover systems. 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%

“…A relatively new approach to storing hydrogen in sorbents is based on the ''spillover'' mechanism, 63 which utilizes a hydrogen dissociation catalyst to generate atomic hydrogen. A key advantage of spillover is its ability to operate at room temperature rather than at 77 K (which is the typical temperature requirement for uptake in sorbents without spillover).…”

Section: Kineticsmentioning

confidence: 99%

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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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Section: Complex Hydridesmentioning

confidence: 99%

Section: Kineticsmentioning

confidence: 99%

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

et al. 2010

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“…[8][9][10] In parallel, researchers have discussed the hydrogen spillover phenomena in which hydrogen atoms are claimed to be stored as chemisorption states after migration from catalytic metal sites. [11][12][13][14] …”

Section: Introductionmentioning

confidence: 99%

Stability of hydrogenation states of graphene and conditions for hydrogen spillover

Han

Jung

et al. 2012

Phys. Rev. B

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The hydrogen spillover mechanism has been discussed in the field of hydrogen storage and is believed to have particular advantage over the storage as metal or chemical hydrides. We investigate conditions for practicality realizing the hydrogen spillover mechanism onto carbon surfaces, using first-principles methods. Our results show that contrary to common belief, types of hydrogenation configurations of graphene (the aggregated all-paired configurations) can satisfy the thermodynamic requirement for room-temperature hydrogen storage. However, the peculiarity of the paired adsorption modes gives rise to a large kinetic barrier against hydrogen migration and desorption. It means that an extremely high pressure is required to induce the migration-derived hydrogenation. However, if mobile catalytic particles are present inside the graphitic interstitials, hydrogen migration channels can open and the spillover phenomena can be realized. We suggest a molecular model for such a mobile catalyst which can exchange hydrogen atoms with the wall of graphene.

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“…This enhancement was attributed to spillover in which hydrogen is first adsorbed by the metal atom, then diffuses and becomes physisorbed. In another study, the same authors reported a reversible hydrogen capacity of 4 wt.% (*8 times pure IRMOF-8) at 298 K and 100 bar pressure for Pt/AC modified IRMOF-8 where primary and secondary spillover was facilitated by carbon bridges [143]. This phenomenon is also considered important for physisorption of hydrogen in CNTs and will be discussed in detail in the following sections.…”

Section: Metal Organic Frameworkmentioning

confidence: 89%

“…In summary, a material with high gravimetric and volumetric hydrogen capacity should have high surface area with pores *0.28-0.35 nm in diameter and a large heat of adsorption ([15-20 kJ/mol) [151]. Catalyzed dissociative adsorption of hydrogen, such as that observed by Li and Yang [142,143], increases the interaction energy as well as the volume fraction that can be penetrated by adsorbed hydrogen [134], which in turn would increase the storage capacity.…”

Section: Metal Organic Frameworkmentioning

confidence: 99%

Advances in the application of nanotechnology in enabling a ‘hydrogen economy’

2008

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Hydrogen is gaining a great deal of attention as an energy carrier as well as an alternative fuel. However, in order to fully implement the so called 'hydrogen economy' significant technical challenges need to be overcome in the fields of production and storage of hydrogen and its point of use especially in fuel cells for the automotive industry. The purpose of this review is to present and discuss recent advances in the use of nanomaterials for solar hydrogen production and on-board solid state storage of hydrogen. The role of nanotechnology in enhancing the efficiency of fuel cells and reducing their cost is also discussed.

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Hydrogen Storage in Metal−Organic Frameworks by Bridged Hydrogen Spillover

Cited by 477 publications

References 18 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

Stability of hydrogenation states of graphene and conditions for hydrogen spillover

Advances in the application of nanotechnology in enabling a ‘hydrogen economy’

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