Reaction kinetics of LaNi5

Miyamoto, Masayoshi; Yamaji, Kunihiko; Nakata, Yoshiki

doi:10.1016/0022-5088(83)90254-0

Cited by 71 publications

(8 citation statements)

References 3 publications

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“…It is known that the limiting reaction rate will be the diffusion through the b layer (Cui et al, 1995(Cui et al, , 2001Ye et al, 1994). Nucleation of the b phase followed by the formation of a hydride layer prevent diffusion to the particle core, as represented in the single particle model as shown in Figure 8(a) (Miyamoto et al, 1983;Nahm et al, 1992;Belkbir et al, 1980;Wang and Suda, 1990). Since the diffusion rate in the b phase can be significantly smaller than in the a phase, minimizing this effect through control of the transportation path of hydrogen to the b phase could promote faster kinetics (Asakuma et al, 2003).…”

mentioning

confidence: 99%

Size effects on the hydrogen storage properties of nanostructured metal hydrides: A review

Bérubé

Radtke

Dresselhaus

et al. 2007

Int. J. Energy Res.

576

161

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Hydrogen is considered a good energy carrier candidate for future automotive applications that could be part of a carbon-free cycle. Metal hydrides are often preferred over pressurized gas and other hydrogen storage methods because of their gravimetric and volumetric storage capacities and safe operating pressures. In addition to the hydrogen storage capacity, other properties that have often been disregarded must now be addressed before hydrogen storage in metal hydrides becomes feasible. The slow hydriding/ dehydriding kinetics, high release temperature, low storage efficiency due to the high enthalpy of formation, and thermal management during the hydriding reaction remain important difficulties in meeting the objectives set by the Department of Energy (DOE) for hydrogen storage systems. Nanotechnology offers new ways of addressing those issues by taking advantage of the distinctive chemical and physical properties observed in nanostructures. Nanostructured materials significantly improve the reaction kinetics, reduce the enthalpy of formation, and lower the hydrogen absorption and release temperatures through destabilization of the metal hydride and multiple catalytic effects in the system. But nanostructures can also lead to poor cyclability, degradation of the sorption properties, and a significant reduction of the thermal conductivity that could make metal hydrides impractical for hydrogen storage. This review summarizes the effects that nanotechnology can have on the main properties of metal hydrides and highlights the main competing behaviours between the system requirements, the necessary trade-offs, and the research priorities necessary to obtain hydride storage materials for practical automotive applications.

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mentioning

confidence: 99%

Size effects on the hydrogen storage properties of nanostructured metal hydrides: A review

Bérubé

Radtke

Dresselhaus

et al. 2007

Int. J. Energy Res.

576

161

View full text Add to dashboard Cite

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“…interface and diffusion controlled processes are the most common ones for the hydride compounds formation/decomposition [41][42][43][44][45][46][47][48][49][50][51].…”

Section: Activation Energy Determination: (A) Isothermal Method (B) mentioning

confidence: 99%

Tailoring the Kinetic Behavior of Hydride Forming Materials for Hydrogen Storage

Puszkiel¹

2019

Gold Nanoparticles - Reaching New Heights

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Hydride forming materials, i.e., binary, complex hydrides, and their mixtures, have been extensively investigated owing to their potential hydrogen storage properties. They possess high volumetric hydrogen capacity and relative high gravimetric hydrogen capacity. However, one of the main constraints for their practical application is their slow kinetic behavior. For this reason, enormous effort has been devoted to improve the hydrogenation and dehydrogenation rates. Several strategies have been developed for the enhancement of the kinetic behavior of the most relevant hydride forming materials such as MgH

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“…Notably, the kinetic model is semi-empirical. The completed hydrogen absorption and desorption kinetic mechanism should be further analyzed by conducting other experiments, such as scanning electron microscopy (SEM) and transmission electron microscopy (TEM) [74]. In this section, the kinetic studies of the hydrogen absorption and desorption processes of AB 5 -type, AB 2 -type, AB-type, and Mg-based HSAs are introduced.…”

Section: Applications To the Different Types Of Hsamentioning

confidence: 99%

Kinetics of the hydrogen absorption and desorption processes of hydrogen storage alloys: A review

Lin

Luo

et al. 2022

Int J Miner Metall Mater

193

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High hydrogen absorption and desorption rates are two significant index parameters for the applications of hydrogen storage tanks. The analysis of the hydrogen absorption and desorption behavior using the isothermal kinetic models is an efficient way to investigate the kinetic mechanism. Multitudinous kinetic models have been developed to describe the kinetic process. However, these kinetic models were deduced based on some assumptions and only appropriate for specific kinetic measurement methods and rate-controlling steps (RCSs), which sometimes lead to confusion during application. The kinetic analysis procedures using these kinetic models, as well as the key kinetic parameters, are unclear for many researchers who are unfamiliar with this field. These problems will prevent the kinetic models and their analysis methods from revealing the kinetic mechanism of hydrogen storage alloys. Thus, this review mainly focuses on the summarization of kinetic models based on different kinetic measurement methods and RCSs for the chemisorption, surface penetration, diffusion of hydrogen, nucleation and growth, and chemical reaction processes. The analysis procedures of kinetic experimental data are expounded, as well as the effects of temperature, hydrogen pressure, and particle radius. The applications of the kinetic models for different hydrogen storage alloys are also introduced.

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Reaction kinetics of LaNi5

Cited by 71 publications

References 3 publications

Size effects on the hydrogen storage properties of nanostructured metal hydrides: A review

Size effects on the hydrogen storage properties of nanostructured metal hydrides: A review

Tailoring the Kinetic Behavior of Hydride Forming Materials for Hydrogen Storage

Kinetics of the hydrogen absorption and desorption processes of hydrogen storage alloys: A review

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