Enriching the hydrogen storage capacity of carbon nanotube doped with polylithiated molecules

Panigrahi, Puspamitra; Naqvi, Syeda Rabab; Hankel, Marlies; Ahuja, Rajeev; Hussain, Tanveer

doi:10.1016/j.apsusc.2018.02.040

Cited by 27 publications

(9 citation statements)

References 39 publications

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“…[4,5,6,7], nanostructured hydrogen storage materials (such as carbon nanotubes, fullerene, functionalized adsorption material and nanosized complex hydrides, etc.) [8,9,10,11,12,13,14,15] and coordination hydride hydrogen storage materials (such as LiBH 4 , NaAlH 4 , Mg(NH 2 ) 2 , etc.) [16,17,18,19,20].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Desorption Properties of LiBH4/xLiAlH4 (x = 0.5, 1, 2) Composites

Zhu

et al. 2019

Molecules

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A detailed analysis of the dehydrogenation mechanism of LiBH4/xLiAlH4 (x = 0.5, 1, 2) composites was performed by thermogravimetry (TG), differential scanning calorimetry (DSC), mass spectral analysis (MS), powder X-ray diffraction (XRD) and scanning electronic microscopy (SEM), along with kinetic investigations using a Sievert-type apparatus. The results show that the dehydrogenation pathway of LiBH4/xLiAlH4 had a four-step character. The experimental dehydrogenation amount did not reach the theoretical expectations, because the products such as AlB2 and LiAl formed a passivation layer on the surface of Al and the dehydrogenation reactions associated with Al could not be sufficiently carried out. Kinetic investigations discovered a nonlinear relationship between the activation energy (Ea) of dehydrogenation reactions associated with Al and the ratio x, indicating that the Ea was determined both by the concentration of Al produced by the decomposition of LiAlH4 and the amount of free surface of it. Therefore, the amount of effective contact surface of Al is the rate-determining factor for the overall dehydrogenation of the LiBH4/xLiAlH4 composites.

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Section: Introductionmentioning

confidence: 99%

Hydrogen Desorption Properties of LiBH4/xLiAlH4 (x = 0.5, 1, 2) Composites

Zhu

et al. 2019

Molecules

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“…As concluded in Table , activated carbons prepared from beer lees and cigarette butt exhibited different H 2 uptake capacity . It can be seen clearly that except for textural properties, the element content, such as high oxygen, nitrogen and sulfur content would promote the hydrogen storage capacity . It is well known that the weak interaction between adsorbed hydrogen and carbon surfaces can be improved via functionalization or doping with various heteroatoms .…”

Section: Resultsmentioning

confidence: 95%

Conversion of Biomass Wastes into Activated Carbons by Chemical Activation for Hydrogen Storage

Peng

Luo

et al. 2020

ChemistrySelect

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The investigation of activated carbons for hydrogen storage has attracted great attention due to their easy availability, adjustable microstructure and large specific surface area. Herein, three kinds of agricultural biomass wastes (bagasse, cornstalk and pine powder) are used to prepare activated carbons via chemical activation (H 3 PO 4 , ZnCl 2 and KOH). The interinfluence of precursors and activators on the activated carbon was investigated. We found that the same biomass treated with different activators possessing totally unique characters, whereas three kinds of biomass activated with the same activators exhibited mild difference. Specifically, KOH contributed the largest specific surface area. The optimized activated carbons were used for hydrogen storage measurement and exhibited high storage capacity. Hydrogen storage capacity of activated carbon is proportional to volume of micropores. Conversion of cheap biomass wastes into activated carbon for hydrogen storage is significant for rational utilization of resources and energy storage.

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“…If the hydrogenation follows the Kubas-type interaction, the H 2 molecules retain their molecular structure and do not dissociate to form metal dihydride [145][146][147]. Compared with hydrogen adsorbed by CNTs, E ad of H 2 molecules adsorbed by metal-doped CNTs increases to 0.2-0.6 eV/H 2 caused by electron transfer from metal atoms to carbon atoms, which is between strong chemisorption and weak physisorption states and is ideal for the reversible adsorption/desorption of H 2 at ambient conditions [47,102,148,149]. The increase in E ad is determined by metal dopants and the size effect of CNTs, as well as the interaction between hydrogen molecules, adsorbed on metal dopants [132][133][134].…”

Section: Loading Metalsmentioning

confidence: 99%

An Overview of the Recent Progress in Modifications of Carbon Nanotubes for Hydrogen Adsorption

2020

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Many researchers have carried out experimental research and theoretical analysis on hydrogen storage in carbon nanotubes (CNTs), but the results are very inconsistent. The present paper reviewed recent progress in improving the hydrogen storage properties of CNTs by various modifications and analyzed the hydrogen storage mechanism of CNTs. It is certain that the hydrogen storage in CNTs is the result of the combined action of physisorption and chemisorption. However, H2 adsorption on metal-functionalized CNTs still lacks a consistent theory. In the future, the research of CNTs for hydrogen adsorption should be developed in the following three directions: (1) A detailed study of the optimum number of metal atoms without aggregation on CNT should be performed, at the same time suitable preparation methods for realizing controllable doping site and doped configurations should be devised; (2) The material synthesis, purification, and activation methods have to be optimized; (3) Active sites, molecular configurations, effectively accessible surface area, pore size, surface topology, chemical composition of the surface, applied pressure and temperature, defects and dopant, which are some of the important factors that strongly affect the hydrogen adsorption in CNTs, should be better understood.

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Enriching the hydrogen storage capacity of carbon nanotube doped with polylithiated molecules

Cited by 27 publications

References 39 publications

Hydrogen Desorption Properties of LiBH4/xLiAlH4 (x = 0.5, 1, 2) Composites

Hydrogen Desorption Properties of LiBH4/xLiAlH4 (x = 0.5, 1, 2) Composites

Conversion of Biomass Wastes into Activated Carbons by Chemical Activation for Hydrogen Storage

An Overview of the Recent Progress in Modifications of Carbon Nanotubes for Hydrogen Adsorption

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