Hydrogen-storage materials dispersed into nanoporous substrates studied through incoherent inelastic neutron scattering

Colognesi, D.; Ulivi, Lorenzo; Zoppi, M.; Ramirez‐Cuesta, Anibal J.; Orecchini, A.; Karkamkar, Abhi; Fichtner, Maximilian; Bardají, Elisa Gil; Zhao‐Karger, Zhirong

doi:10.1016/j.jallcom.2012.05.081

Cited by 15 publications

(7 citation statements)

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“…Comparable improved dehydrogenation properties were reported for mesoporous silica MCM-41 [242][243][244], silica hollow nanospheres [245] and silica aerogel [246]. Note that the infiltration of AB is feasible with another suitable solvent, i.e., tetrahydrofuran [247], but the most important aspect is to avoid the presence of ammonia borane outside the porosity, because non-confined ammonia borane (also called an excess of ammonia borane) forms aggregates outside the scaffold porosity and behaves like pristine ammonia borane [248,249]. With silica as the scaffold, the purity of the released H 2 is debated.…”

Section: Nanoconfinement Of Ammonia Boranementioning

confidence: 81%

Ammonia Borane: An Extensively Studied, Though Not Yet Implemented, Hydrogen Carrier

Demirci

2020

Energies

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Ammonia borane H3N−BH3 (AB) was re-discovered, in the 2000s, to play an important role in the developing hydrogen economy, but it has seemingly failed; at best it has lagged behind. The present review aims at analyzing, in the context of more than 300 articles, the reasons why AB gives a sense that it has failed as an anodic fuel, a liquid-state hydrogen carrier and a solid hydrogen carrier. The key issues AB faces and the key challenges ahead it has to address (i.e., those hindering its technological deployment) have been identified and itemized. The reality is that preventable errors have been made. First, some critical issues have been underestimated and thereby understudied, whereas others have been disproportionally considered. Second, the potential of AB has been overestimated, and there has been an undoubted lack of realistic and practical vision of it. Third, the competition in the field is severe, with more promising and cheaper hydrides in front of AB. Fourth, AB has been confined to lab benches, and consequently its technological readiness level has remained low. This is discussed in detail herein.

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Section: Nanoconfinement Of Ammonia Boranementioning

confidence: 81%

Ammonia Borane: An Extensively Studied, Though Not Yet Implemented, Hydrogen Carrier

Demirci

2020

Energies

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“…Due to its significant surface area, mechanical stability, and great thermal stability, SiO 2 is the most often used material. [113][114][115][116][117][118] More so, recent research and findings have shown that the confinement of hydrides in porous material at the nanoscale range can affect hydrides' hydrogen sorption capabilities. Such nanoporous materials mainly focused on nowadays are silica such as MCM-41, SBA-15 and hollow silica materials.…”

Section: Research Trends On Porous Scaffoldsmentioning

confidence: 99%

“…Silicon dioxide (SiO 2 ), also called silica, is known to be one of the important porous materials used to safely store and confine hydrogen. Due to its significant surface area, mechanical stability, and great thermal stability, SiO 2 is the most often used material [113–115,116–118] . More so, recent research and findings have shown that the confinement of hydrides in porous material at the nanoscale range can affect hydrides′ hydrogen sorption capabilities.…”

Section: Research Trends On Porous Scaffoldsmentioning

confidence: 99%

Progress and Advances in Porous Silica‐based Scaffolds for Enhanced Solid‐state Hydrogen Storage: A Systematic Literature Review

Abdulkadir,

Jalil,

Cheng

et al. 2023

Chemistry An Asian Journal

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Hydrogen plays a crucial role in the future energy landscape owing to its high energy density. However, finding an ideal storage material is the key challenge to the success of the hydrogen economy. Various solid‐state hydrogen storage materials, such as metal hydrides, have been developed to realize safe, effective, and compact hydrogen storage. However, low kinetics and thermodynamic stability lead to a high working temperature and a low hydrogen sorption rate of the metal hydrides. Using scaffolds made from porous materials like silica to confine the metal hydrides is necessary for better and improved hydrogen storage. Therefore, this article reviews porous silica‐based scaffolds as an ideal material for improved hydrogen storage. The outcome showed that confining the metal hydrides using scaffolds based on porous silica significantly increases their storage capacities. It was also found that the structural modifications of the silica‐based scaffold into a hollow structure further improved the storage capacity and increased the affinity and confinement ability of the metal hydrides, which prevents the agglomeration of metal particles during the adsorption/desorption process. Hence, the structural modifications of the silica material into a fibrous and hollow material are recommended to be crucial for further enhancing the metal hydride storage capacity.

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“…33 About 7.5 wt% hydrogen was generated by the hydrolysis of the MWCNT doped LiBH 4 . 34 In the meantime, other carbon catalysts like single-walled carbon nanotubes, 35 mesoporous carbon, [36][37][38] highly ordered hexagonal nanoporous hard carbon, 39 carbon aerogel, 40,41 carbon fibers 42 and fullerenes (C60) 43 were respectively used as substrates for LiBH 4 , and various destabilized hydrogen storage systems were generated. Specifically, we found that the graphene catalysts doped LiBH 4 showed superior dehydrogenation and rehydrogenation performances to Vulcan XC-72, carbon nanotube and BP2000 doped LiBH 4 .…”

Section: Introductionmentioning

confidence: 99%

Reversible hydrogen desorption from LiBH4 catalyzed by graphene supported Pt nanoparticles

Cao

et al. 2013

Dalton Trans.

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The thermally induced de-/rehydrogenation performance of the graphene supported Pt nanoparticles (Pt/G) doped LiBH4 was greatly improved even at very low catalyst content due to a synergetic effect of Pt addition and nanoconfinement in graphene. For the 5 wt% Pt/G doped LiBH4 sample, the onset hydrogen desorption temperature is about 140 °C lower than that of the pure LiBH4. With increasing loading of the Pt/G catalysts in LiBH4 samples, the onset dehydrogenation temperature and the two main desorption peaks from LiBH4 were found to decrease while the hydrogen release amount increased. About 17.8 wt% can be released from the 50 wt% Pt/G doped LiBH4 sample below 500 °C. Moreover, variation of the equilibrium pressure (350-450 °C) indicates that the dehydrogenation enthalpy is reduced from 74 kJ mol(-1) H2 for the pure LiBH4 to ca. 48 kJ mol(-1) H2 for the 10 wt% Pt/G doped LiBH4, showing improved thermodynamic properties. More importantly, a reversible capacity of ca. 8.1 wt% in the 30th de-/rehydrogenation cycle was achieved under 3 MPa H2 at 400 °C for 10 h, indicating that the Pt/G catalysts play a crucial role in the improvement of the hydrogen uptake reversibility of LiBH4 at lower temperature and pressure conditions. Especially, LiBH4 was reformed and a new product, Li2B10H10, was detected after the rehydrogenation process.

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Hydrogen-storage materials dispersed into nanoporous substrates studied through incoherent inelastic neutron scattering

Cited by 15 publications

References 50 publications

Ammonia Borane: An Extensively Studied, Though Not Yet Implemented, Hydrogen Carrier

Ammonia Borane: An Extensively Studied, Though Not Yet Implemented, Hydrogen Carrier

Progress and Advances in Porous Silica‐based Scaffolds for Enhanced Solid‐state Hydrogen Storage: A Systematic Literature Review

Reversible hydrogen desorption from LiBH4 catalyzed by graphene supported Pt nanoparticles

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