Impact of severe plastic deformation on kinetics and thermodynamics of hydrogen storage in magnesium and its alloys

Significance of interphase boundaries on activation of high-entropy alloys for room-temperature hydrogen storage

“…These high-resolution analyses are in line with XRD and EBSD analyses for this alloy. All these microstructural analyses confirm the successful introduction of interphase boundaries in TiV1.5ZrCr0.5MnFeNi, which may act positively to enhance the activation for hydrogen storage [19][20][21][22][23]. suggests that the alloy is almost a single-phase HEA and the fraction of BCC phase is less than 0.5 vol% which is consistent with XRD analysis.…”

“…The design and successful synthesis of the single-phase Laves phase from seven different elements is a good finding because C14 is considered a promising phase for hydrogen storage [26][27][28][29][30][31]. structural and microstructural analyses confirm that the fraction of interphase boundaries in TiV1.5Zr1.5CrMnFeNi alloy is too low to influence its hydrogenation properties [19][20][21][22][23]. Moreover, due to the large grain size of the C14 phase (~1.1 μm), the fraction of grain boundaries is not also high enough to influence the activation for hydrogen storage [15][16][17][18].…”

CNTs-Pd as Efficient Bidirectional Catalyst for Improving Hydrogen Absorption/Desorption Kinetics of Mg/MgH2

“…Alloys are commonly employed as catalysts for facilitating release and uptake of hydrogen in Mg/MgH 2 , expediting the processes of hydrogen dissociation and diffusion to effectively enhance the hydrogen sorption/desorption properties of Mg/MgH 2 . 37,38 Transition metals have been demonstrated to be efficient catalysts in improving the hydrogenation performance of Mg. Among the transition metals, Pd presents an excellent catalytic effect and generates a positive influence on the hydriding property of Mg.…”

“…Catalyst doping is considered as an effective strategy to improve the kinetic properties of hydride, particularly transition metal catalysts, because of their excellent catalytic performance and ease in forming intermetallic hydrides. , The formation of alloys is an efficient technique for modulating the hydrogen storage capabilities of MgH 2 . Alloys are commonly employed as catalysts for facilitating release and uptake of hydrogen in Mg/MgH 2 , expediting the processes of hydrogen dissociation and diffusion to effectively enhance the hydrogen sorption/desorption properties of Mg/MgH 2 . , Transition metals have been demonstrated to be efficient catalysts in improving the hydrogenation performance of Mg. Among the transition metals, Pd presents an excellent catalytic effect and generates a positive influence on the hydriding property of Mg.…”

First‐Principles Calculations and a Theoretical Model for Predicting Stacking Fault Energies in Binary Magnesium Alloys

“…[7,8] Considerable efforts have been carried out attempting to overcome the aforementioned limitations, including grain refinement, weakening basal texture, and modifying twin formation, among others. [9][10][11][12][13][14] Among the numerous attempts to enhance the ductility and workability of Mg alloys, one possible route is to target on tuning the unstable/stable stacking fault energy (SFE). The SFE is a key parameter in crystalline materials playing an important role in prescribing key dislocation characteristics such as dislocation energy, ideal shear strength, and dislocation core structure.…”