Polyaniline-based nanocomposite materials for hydrogen storage

Jurczyk, M.; Kumar, Ashok; Srinivasan, Sesha S.; Stefanakos, Elias K.

doi:10.1016/j.ijhydene.2006.07.012

Cited by 64 publications

(26 citation statements)

References 17 publications

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“…These nanofillers, thought as catalysts, can be improve the H 2 storage properties of the modified PANI. Some of these, such as MWNTs, SnO 2 and Al powder, were found interesting H 2 storage value in a T range of 298-398 K. In fact PANI with Al powder at 398 K improve the H 2 sorption of pristine PANI from 0,35 to 0,5 wt% at 60 bar (Jurczyk et al, 2007).…”

Section: Comparison Resultsmentioning

confidence: 98%

Solid State Hydrogen Storage in Polymeric Materials: A Review

Pedicini¹

2017

Energy Research Journal

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Hydrogen storage is one of the major obstacles to overcoming so that hydrogen becomes next fuel and/or energy carrier of the future. The hydrogen storage materials are one of the principal challenges that must be met before the development of a hydrogen economy. Among all materials studied an important class that could have a future, in particular in portable applications, is the polymers class. Here are reported some results obtained using different polymeric matrices in different operative conditions.

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Section: Comparison Resultsmentioning

confidence: 98%

Solid State Hydrogen Storage in Polymeric Materials: A Review

Pedicini¹

2017

Energy Research Journal

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“…Unfortunately, these results could not be reproduced independently, instead room temperature values of less than 0.5 wt% at pressures up to 94 bar were subsequently observed for similar samples [66,67].…”

Section: Organic Polymersmentioning

confidence: 95%

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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“…In recent years, many new and novel hydrogen storage systems are being investigated, namely, (i) Mg-transition metal hydrides (e.g. Mg 2 FeH 6 ) [5,6]; complex hydrides such as (ii) alanates [7][8][9], (iii) borohydrides [10] and (iv) amides [11,12], (v) amino-boranes [13]; physisorbed systems such as (vi) fullerenes [14], (vii) carbon nanotubes [15,16] (viii) graphitic nanofibres [17] (ix) metal organic frameworks [18,19] and (x) polymer nanocomposite matrices [20,21], etc. However, none of the hydride systems typified above satisfy all of the desired characteristics of hydrogen storage such as high volumetric and gravimetric hydrogen density, low temperature, rapid desorption kinetics, tolerance hysteresis, insensitivity to impurities, cost and weight, etc.…”

Section: Introductionmentioning

confidence: 99%