Hydrogen Nanometrology in Advanced Carbon Nanomaterial Electrodes

Lobo, Rui F. M.; Alvarez, Noe T.; Shanov, Vesselin

doi:10.3390/nano11051079

Cited by 3 publications

(4 citation statements)

References 45 publications

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“…Our laboratory equipment allowed the determination of tiny amounts of hydrogen absorbed in a solid medium, which is of great importance in increasing energy efficiency compared to alternative methods of hydrogen storage [48,50]. Also, the development and/or improvement of electrocatalysis or plasma catalysis techniques involves the creation of suitable nanoparticles.…”

Section: Discussionmentioning

confidence: 99%

“…The recently developed molecular-beam thermal desorption spectrometry (MB-TDS) method has been used for this purpose [48,49]. With some benefits, this method was created to detect the hydrogen released by the smallest amounts of solid samples [48,50]. The accurate assessment of the hydrogen mass absorbed on a solid sample has significantly improved thanks to MB-TDS (note that this novel thermal desorption variation is based on an effusive molecular beam [49]).…”

Section: (B) Improving Hydrogen Storagementioning

confidence: 99%

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A Brief on Nano-Based Hydrogen Energy Transition

Lobo

2023

Hydrogen

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Considering the clean, renewable, and ecologically friendly characteristics of hydrogen gas, as well as its high energy density, hydrogen energy is thought to be the most potent contender to locally replace fossil fuels. The creation of a sustainable energy system is currently one of the critical industrial challenges, and electrocatalytic hydrogen evolution associated with appropriate safe storage techniques are key strategies to implement systems based on hydrogen technologies. The recent progress made possible through nanotechnology incorporation, either in terms of innovative methods of hydrogen storage or production methods, is a guarantee of future breakthroughs in energy sustainability. This manuscript addresses concisely and originally the importance of including nanotechnology in both green electroproduction of hydrogen and hydrogen storage in solid media. This work is mainly focused on these issues and eventually intends to change beliefs that hydrogen technologies are being imposed only for reasons of sustainability and not for the intrinsic value of the technology itself. Moreover, nanophysics and nano-engineering have the potential to significantly change the paradigm of conventional hydrogen technologies.

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Section: Discussionmentioning

confidence: 99%

Section: (B) Improving Hydrogen Storagementioning

confidence: 99%

A Brief on Nano-Based Hydrogen Energy Transition

Lobo

2023

Hydrogen

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“…Establishing an appropriate means of transportation is an important element in achieving a hydrogen energy society [27,28]. Carbon materials can safely store hydrogen [29,30] and lithium (Li)-doped graphene is a particularly effective storage material [31,32]. Unfortunately, lithium is high cost metal because it must travel long distances to be commercialized.…”

Section: Binding Structures Of H2 To Gnf-namentioning

confidence: 99%

Reactions of Graphene Nano-Flakes in Materials Chemistry and Astrophysics

Tachikawa

Iyama

2022

Physchem

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The elucidation of the mechanism of the chemical evolution of the universe is one of the most important themes in astrophysics. Polycyclic aromatic hydrocarbons (PAHs) provide a two-dimensional reaction field in a three-dimensional interstellar space. Additionally, PAHs play an important role as a model of graphene nanoflake (GNF) in materials chemistry. In the present review, we introduce our recent theoretical studies on the reactions of PAH and GNF with several molecules (or radicals). Furthermore, a hydrogen storage mechanism for alkali-doped GNFs and the molecular design of a reversible hydrogen storage device based on GNF will be introduced. Elucidating these reactions is important in understanding the chemical evolution of the universe and gives deeper insight into materials chemistry.

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“…The establishment of appropriate transportation methods is an important factor when socially implementing hydrogen energy [13,14]. Carbon materials can safely store hydrogen [15,16]; in particular, lithium (Li)-doped graphene and carbon nanotubes (CNTs) have been used as effective storage materials [17,18]. Unfortunately, lithium is expensive because it is generally shipped from various international locations to China for processing into various products; therefore, alternative metals are required to realize a hydrogen-based society.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Storage Mechanism in Sodium-Based Graphene Nanoflakes: A Density Functional Theory Study

Tachikawa

Iyama

et al. 2022

Hydrogen

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Carbon materials, such as graphene nanoflakes, carbon nanotubes, and fullerene, can be widely used to store hydrogen, and doping these materials with lithium (Li) generally increases their H2-storage densities. Unfortunately, Li is expensive; therefore, alternative metals are required to realize a hydrogen-based society. Sodium (Na) is an inexpensive element with chemical properties that are similar to those of lithium. In this study, we used density functional theory to systematically investigate how hydrogen molecules interact with Na-doped graphene nanoflakes. A graphene nanoflake (GR) was modeled by a large polycyclic aromatic hydrocarbon composed of 37 benzene rings, with GR-Na-(H2)n and GR-Na+-(H2)n (n = 0–12) clusters used as hydrogen storage systems. Data obtained for the Na system were compared with those of the Li system. The single-H2 GR-Li and GR-Na systems (n = 1) exhibited binding energies (per H2 molecule) of 3.83 and 2.72 kcal/mol, respectively, revealing that the Li system has a high hydrogen-storage ability. This relationship is reversed from n = 4 onwards; the Na systems exhibited larger or similar binding energies for n = 4–12 than the Li-systems. The present study strongly suggests that Na can be used as an alternative metal to Li in H2-storage applications. The H2-storage mechanism in the Na system is also discussed based on the calculated results.

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Hydrogen Nanometrology in Advanced Carbon Nanomaterial Electrodes

Cited by 3 publications

References 45 publications

A Brief on Nano-Based Hydrogen Energy Transition

A Brief on Nano-Based Hydrogen Energy Transition

Reactions of Graphene Nano-Flakes in Materials Chemistry and Astrophysics

Hydrogen Storage Mechanism in Sodium-Based Graphene Nanoflakes: A Density Functional Theory Study

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