Probing the Room Temperature Deuterium Absorption Kinetics in Nanoscale Magnesium Based Hydrogen Storage Multilayers Using Neutron Reflectometry, X-ray Diffraction, and Atomic Force Microscopy

Kalisvaart, W. Peter; Luber, Erik J.; Poirier, Éric; Harrower, Christopher; Teichert, A.; Wallacher, Dirk; Grimm, Nico; Steitz, Roland; Fritzsche, H.; Mitlin, David

doi:10.1021/jp209296b

Cited by 18 publications

(16 citation statements)

References 60 publications

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“…The decrease in the SLD of the Fe layer means it has significant amounts of dissolved Pd and/or Ta now, as both elements have lower scattering lengths than Fe. A strong decrease in the fitted SLD of the catalyst bilayer occurring simultaneously with a large increase in surface roughness has been observed before and was found to be related to dewetting [37]. When exposing the sample at RT to 1 bar of D 2 the reflectivity curve changes dramatically as can be seen in Fig.…”

Section: Reflectometry Experimentssupporting

confidence: 69%

Reactions in a multilayered Si (substrate)/Ta/Mg/Fe/Ta/Pd thin-film structure during annealing and deuterium absorption

et al. 2015

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Section: Reflectometry Experimentssupporting

confidence: 69%

Reactions in a multilayered Si (substrate)/Ta/Mg/Fe/Ta/Pd thin-film structure during annealing and deuterium absorption

et al. 2015

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“…One prominent and archetypical material system is magnesium (Mg), which has been widely studied, however, mainly in the context of hydrogen storage (16)(17)(18)(19)(20)(21)(22)(23). In its initial metallic state, Mg shows large free electron densities accompanied with comparably small parasitic loss and is consequently an excellent plasmonic material (24,25).…”

Section: Introductionmentioning

confidence: 99%

Watching in situ the hydrogen diffusion dynamics in magnesium on the nanoscale

et al. 2020

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Active plasmonic and nanophotonic systems require switchable materials with extreme material contrast, short switching times, and negligible degradation. On the quest for these supreme properties, an in-depth understanding of the nanoscopic processes is essential. Here, we unravel the nanoscopic details of the phase transition dynamics of metallic magnesium (Mg) to dielectric magnesium hydride (MgH2) using free-standing films for in situ nanoimaging. A characteristic MgH2 phonon resonance is used to achieve unprecedented chemical specificity between the material states. Our results reveal that the hydride phase nucleates at grain boundaries, from where the hydrogenation progresses into the adjoining nanocrystallites. We measure a much faster nanoscopic hydride phase propagation in comparison to the macroscopic propagation dynamics. Our innovative method offers an engineering strategy to overcome the hitherto limited diffusion coefficients and has substantial impact on the further design, development, and analysis of switchable phase transition as well as hydrogen storage and generation materials.

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“…Very recently, in situ neutron diffraction analysis and combination of neutron reflectrometry, X-ray diffraction and atomic force microscopy have shed much insight in uncovering the performance and mechanism of catalyzed Mg-based nanomaterials. 111,112 Since hydrogen uptake/release in/from the Mg/MgH 2 system may involve complex processes of surface interactions, atomic or molecular migration/diffusion, catalytic reactions and phase transformations, multidisciplinary research is necessary to fully elucidate the reaction mechanism. Second, it is difficult to prepare Mg-based nanostructures with high phase purity and well controlled shape and size, due to high reactivity of Mg.…”

Section: Discussionmentioning

confidence: 99%

Efficient hydrogen storage with the combination of lightweight Mg/MgH2 and nanostructures

et al. 2012

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Efficient hydrogen storage plays a key role in realizing the incoming hydrogen economy. However, it still remains a great challenge to develop hydrogen storage media with high capacity, favourable thermodynamics, fast kinetics, controllable reversibility, long cycle life, low cost and high safety. To achieve this goal, the combination of lightweight materials and nanostructures should offer great opportunities. In this article, we review recent advances in the field of chemical hydrogen storage that couples lightweight materials and nanostructures, focusing on Mg/MgH(2)-based systems. Selective theoretical and experimental studies on Mg/MgH(2) nanostructures are overviewed, with the emphasis on illustrating the influences of nanostructures on the hydrogenation/dehydrogenation mechanisms and hydrogen storage properties such as capacity, thermodynamics and kinetics. In particular, theoretical studies have shown that the thermodynamics of Mg/MgH(2) clusters below 2 nm change more prominently as particle size decreases.

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Probing the Room Temperature Deuterium Absorption Kinetics in Nanoscale Magnesium Based Hydrogen Storage Multilayers Using Neutron Reflectometry, X-ray Diffraction, and Atomic Force Microscopy

Cited by 18 publications

References 60 publications

Reactions in a multilayered Si (substrate)/Ta/Mg/Fe/Ta/Pd thin-film structure during annealing and deuterium absorption

Reactions in a multilayered Si (substrate)/Ta/Mg/Fe/Ta/Pd thin-film structure during annealing and deuterium absorption

Watching in situ the hydrogen diffusion dynamics in magnesium on the nanoscale

Efficient hydrogen storage with the combination of lightweight Mg/MgH2 and nanostructures

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