Increase of Hydrogen Storage Capacity of CNTs by Using Transition Metal, Metal Oxide-CNT Nanocomposites

Larijani, M. M.; Safa, S.

doi:10.12693/aphyspola.126.732

Cited by 18 publications

(3 citation statements)

References 20 publications

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“…The study by Larijani et al 77 has adopted further modifications of carbon nanotubes (CNTs) through the decoration with nanoparticles of transition metal oxides. The incorporation of these transition metal oxides can enhance hydrogen storage due to the active catalytic role of the metals.…”

Section: D-2d Nanocompositesmentioning

confidence: 99%

Mixed-dimensional nanocomposites based on 2D materials for hydrogen storage and CO2 capture

Park,

Lee,

Choi

et al. 2023

npj 2D Mater Appl

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Porous materials possessing high surface areas are of paramount importance in gas separation and storage, as they can potentially adsorb a large amount of gas per unit of mass or volume. Pore structure and functionality are also important factors affecting adsorbate–absorbent interactions. Hence, efforts have been devoted to developing adsorbents with large accessible surface areas and tunable functionalities to realize improvements in gas adsorption capacity. However, the gas adsorption and storage capacities of porous materials composed of a single type of building unit are often limited. To this end, mixed-dimensional hybrid materials have been developed, as they can contain more gas storage sites within their structures than simple porous materials. In this review, we discuss (1) the methods that have been used to assemble various dimensional building blocks into a range of mixed-dimensional (zero-dimensional–two-dimensional, one-dimensional–two-dimensional, and three-dimensional–two-dimensional) hybrid materials exhibiting synergistic adsorption effects, and (2) these materials’ hydrogen and carbon dioxide adsorption properties and how they are correlated with their accessible surface areas. We conclude by outlining the challenges remaining to be surmounted to realize practical applications of mixed-dimensional hybrid materials and by providing future perspectives.

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Section: D-2d Nanocompositesmentioning

confidence: 99%

Mixed-dimensional nanocomposites based on 2D materials for hydrogen storage and CO2 capture

Park,

Lee,

Choi

et al. 2023

npj 2D Mater Appl

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“…To increase the possibility of hydrogen storage by CNTs, they can be decorated with metals, which has been proved by computer simulations for: titanium (up to 7.7 wt.%) [ 44 ], scandium (up to 9.8 wt.%) [ 45 ], aluminum (up to 6.15 wt.%) [ 46 ], or vanadium (up to 9.2 wt.%) [ 45 ]. However, most of the time, the amount of hydrogen stored in decorated CNTs often does not exceed 2 wt.% under experimental conditions [ 47 , 48 ]. However, increasing the gravimetric density of these systems is achieved through the use of low temperatures (e.g., nanotubes decorated with platinum in 125 K made it possible to store about 3.5 wt.% of hydrogen [ 49 ]).…”

Section: Hydrogen Storage In Carbon Materials Not Based On Graphene Structuresmentioning

confidence: 99%

Emerging Technology for a Green, Sustainable Energy-Promising Materials for Hydrogen Storage, from Nanotubes to Graphene—A Review

Jastrzębski

Kula

2021

Materials

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The energetic and climate crises should pose a challenge for scientists in finding solutions in the field of renewable, green energy sources. Throughout more than two decades, the search for new opportunities in the energy industry made it possible to observe the potential use of hydrogen as an energy source. One of the greatest challenges faced by scientists for the sake of its use as an energy source is designing safe, usable, reliable, and effective forms of hydrogen storage. Moreover, the manner in which hydrogen is to be stored is closely dependent on the potential use of this source of green energy. In stationary use, the aim is to achieve high volumetric density of the container. However, from the point of view of mobile applications, an extremely important aspect is the storage of hydrogen, using lightweight tanks of relatively high density. That is why, a focus of scientists has been put on the use of carbon-based materials and graphene as a perspective solution in the field of H2 storage. This review focuses on the comparison of different methods for hydrogen storage, mainly based on the carbon-based materials and focuses on efficiently using graphene and its different forms to serve a purpose in the future H2-based economy.

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“…The introduction of a carbon vacancy into a small diameter SWCNT increases the adsorption energy of the transition metal (TM) cluster in comparison to pristine nanotube or to graphite sheet surfaces [22][23][24][25][26][27]. On the other hand, it is well known that the addition of TM to a CNT improves hydrogen adsorption as well as electrical contact [25][26][27][28][29]. The TMs that have been investigated most widely as possible candidates are Rh, Ti, Pd, Al, and Pt [24,[30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Rhodium clustering process on defective (8,0) SWCNT: Analysis of chemical and physical properties using density functional theory

Ambrusi

Luna

Sandoval

et al. 2017

Applied Surface Science

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Rhodium clustering process on defective (8,0) SWCNT: Analysis of chemical and physical properties using density functional theory, Applied Surface Sciencehttp://dx. HighlightsRh3 and Rh4 clusters prefer to be adsorbed on oxygenated vacancy. Rh adsorption induces a magnetic moment. Rh atom and Rh2 dimer bonded to the defective SWCNT, show a semiconductor behavior. Rh3 and Rh4 show a metallic behavior. AbstractThe Spin-polarized density functional theory is used to study the effect of a single vacancy in a (8,0) single-walled carbon nanotube (SWCNT) on the Rh clustering process. The vacancy is considered oxygenated and non-oxygenated and, in each case, different Rhn cluster sizes (n =1-4) are taken into account. For the analysis of these systems some physical and chemical properties are calculated, such as binding energy (Eb), work function (WF), magnetic moment, charge transfer, bond length, band gap (Eg), and density of state (DOS). From this analysis it can be concluded that: a single Rh atom and Rh2 dimer are adsorbed on vacancy without oxygen, whereas Rh3 and Rh4 clusters prefer to be adsorbed on oxygenated vacancy. In all cases, Rh adsorption induces a magnetic moment. When the Rh atom and Rh2 dimer are bonded to the defective SWCNT, it has been found that they show a semiconductor behavior that could be interesting to use in the spintronic area. In the case of Rh3 and Rh4 clusters our results show a metallic behavior suggesting that these systems are good candidates for nanotube contact.

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Increase of Hydrogen Storage Capacity of CNTs by Using Transition Metal, Metal Oxide-CNT Nanocomposites

Cited by 18 publications

References 20 publications

Mixed-dimensional nanocomposites based on 2D materials for hydrogen storage and CO2 capture

Mixed-dimensional nanocomposites based on 2D materials for hydrogen storage and CO2 capture

Emerging Technology for a Green, Sustainable Energy-Promising Materials for Hydrogen Storage, from Nanotubes to Graphene—A Review

Rhodium clustering process on defective (8,0) SWCNT: Analysis of chemical and physical properties using density functional theory

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