Comparison of hydrogen adsorption on nanoporous materials

Bénard, Pierre; Chahine, Richard; Chandonia, P.A.; Cossement, Daniel; Dorval-Douville, G.; Lafi, Lyubov; Lachance, P.; Paggiaro, R.; Poirier, Éric

doi:10.1016/j.jallcom.2006.11.192

Cited by 64 publications

(37 citation statements)

References 25 publications

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“…Similarly, Bénard et al [143] studied the physisorption of hydrogen on activated carbon (AC) nanoporous structures with slitpores (pore width varying from 0.9 to 2 nm) by means of the Ono-Kondo Fig. 18.…”

Section: Filtration and Membranesmentioning

confidence: 99%

Nanoporous polymeric materials: A new class of materials with enhanced properties

Notario

Pinto

Rodríguez‐Pérez

2016

Progress in Materials Science

180

125

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a b s t r a c tNanoporous polymeric materials are porous materials with pore sizes in the nanometer range (i.e., below 200 nm), processed as bulk or film materials, and from a wide set of polymers. Over the last several years, research and development on these novel materials have progressed significantly, because it is believed that the reduction of the pore size to the nanometer range could strongly influence some of the properties of porous polymers, providing unexpected and improved properties compared to conventional porous and microporous polymers and non-porous solids.In this review, the key properties of these nanoporous polymeric materials (mechanical, thermal, dielectric, optical, filtration, sensing, etc.) are analyzed. The experimental and theoretical results obtained up to date related to the structure-property relations are presented. In several sections, in order to present a more compressive approach, the trends obtained for nanoporous polymers are compared to those for metallic and ceramic nanoporous systems. Moreover, some specific characteristics of these materials, such as the consequences of the confinement of both gas and solid phases, are described. Likewise, the main production methods are briefly described. Finally, some of the potential applications of these materials are also discussed in this paper.

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Section: Filtration and Membranesmentioning

confidence: 99%

Nanoporous polymeric materials: A new class of materials with enhanced properties

Notario

Pinto

Rodríguez‐Pérez

2016

Progress in Materials Science

180

125

View full text Add to dashboard Cite

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“…Atomic H is a photolytic product of H 2 O ice and in the presence of a third body (e.g., a grain surface), can combine with other H atoms to form H 2 . At the $100 K temperature of Hyperion's surface, H 2 readily adsorbs on microporous grains of disordered carbon (Bénard et al, 2007), such as that found in comet samples from the Stardust mission (e.g., Matrajt et al, 2007), in meteorites, and in the hydrogenated amorphous carbon (HAC) identified in interstellar dust. H 2 adsorbed on zeolite shows an absorption band at 2.423 lm and the band is seen over a narrow range of wavelengths around 2.42 lm in H 2 adsorbed on metal-organic frameworks, which are microporous crystalline structures consisting of metal ions coordinated to organic molecules (Clark et al, in preparation, 2012).…”

Section: Molecular Hydrogenmentioning

confidence: 99%

Compositional analysis of Hyperion with the Cassini Visual and Infrared Mapping Spectrometer

Dalton

Cruikshank

Clark

2012

Icarus

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“…Additionally, the very small pore volume associated with these sites would give a very small contribution to the hydrogen storage, even if these were accessible [57,58]. At least two different adsorption sites for hydrogen in single-walled carbon nanotubes could be identified by inelastic neutron scattering (INS) [59], by low-temperature hydrogen adsorption [60], by thermal desorption spectroscopy [61], and by Raman spectroscopy [62,63].…”

Section: Carbon Materialsmentioning

confidence: 99%

Physisorption in Porous Materials

Hirscher¹,

Panella²

2010

Handbook of Hydrogen Storage

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Physisorption or physical adsorption is the mechanism by which hydrogen is stored in the molecular form, that is, without dissociating, on the surface of a solid material. Responsible for the molecular adsorption of H 2 are weak dispersive forces, called van der Waals forces, between the gas molecules and the atoms on the surface of the solid. These intermolecular forces derive from the interaction between temporary dipoles which are formed due to the fluctuations in the charge distribution in molecules and atoms. The combination of attractive van der Waals forces and short range repulsive interactions between a gas molecule and an atom on the surface of the adsorbent results in a potential energy curve which can be well described by the Lennard-Jones Eq. (2.1).where e is the depth of the energy well, r i the distance between an H 2 molecule and a generic atom i on the surface and s the value of r i for which the potential is zero [1]. The minimum of the potential curve occurs at a distance from the surface which is approximately the sum of the van der Waals radii of the adsorbent atom and the adsorbate molecule. For microporous materials (r pore < 1 nm) [2] where the pore dimensions are comparable to the diameter of the adsorbate molecules this interaction potential is also influenced by the pore shape and the pore dimensions. Adsorption is an exothermic process, that is, heat is released during the adsorption of gas molecules on a surface. Owing to the low polarizability of the H 2 molecule this type of interaction is very weak and leads to low values of the heat of adsorption, typically in the range of 1-10 kJ mol À1 [3]. Compared to chemisorption which involves a change in the chemical nature of the H 2 molecule by, for example, dissociation, physisorption has approximately a ten times smaller heat of adsorption. Chemical hydrides and complex hydrides, which store hydrogen chemically, both have the disadvantage of producing an excessive amount of heat during fast Handbook of Hydrogen Storage. Edited by Michael Hirscher

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Comparison of hydrogen adsorption on nanoporous materials

Cited by 64 publications

References 25 publications

Nanoporous polymeric materials: A new class of materials with enhanced properties

Nanoporous polymeric materials: A new class of materials with enhanced properties

Compositional analysis of Hyperion with the Cassini Visual and Infrared Mapping Spectrometer

Physisorption in Porous Materials

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