Hydrogen storage properties of magnesium ultrafine particles prepared by hydrogen plasma-metal reaction

Preparation and hydrogen sorption properties of a nano-structured Mg based Mg–La–O composite

“…6a shows the hydrogen absorption profiles of the MgeLaeO nano-composite measured at different temperatures under 3.5 MPa of hydrogen pressure. It is found that the composite can absorb 6.38 wt% of hydrogen after 2 h and about 4.81 wt% within 15 min at 523 K. At 473 K, the composite is able to absorb 5.98 wt% of hydrogen after 2 h. In contrast, the pure Mg powders prepared also through arc plasma method followed by passivation can only absorb 1.8 wt% of hydrogen in 2 h. It should be noted that when the temperature reduces to 448 K, the composite can still absorb 5.35 wt% of hydrogen within 2 h and about 2.57 wt% within 15 min, much faster than pure Mg ultrafine powders [14,15]. Usually, the hydrogen absorption process can be described by JohnsoneMehleAvramieKolmogorov (JMAK) model given below:…”

“…The sample preparations were done using an Arc Plasma Evaporation apparatus [14]. The main process to produce MgeLa composite involves an arc evaporation of the mixture of pure Mg and pure La powders.…”

The kinetics of lightweight solid-state hydrogen storage materials: A review

“…Some of the benefits of using these techniques are the easy synthesis of rare earth materials into alloys and hydride phases, the synthesis of ultrafine particles (UFPs), the production of more convenient and cost-effective nanoparticles of intermetallic compounds, and the production of highly reactive surfaces [149]. Shao et al [150] reported that a factor that perturbs the rate of metal particles is the evaporation level of metal elements. There was some of the materials exhibit low hydrogen contents with decreasing intermetallic particles.…”

Hydrogen generation from water using Mg nanopowder produced by arc plasma method

“…MgH 2 satisfies this requirement, comprising 7.6 wt% hydrogen. Although Mg cannot react with hydrogen at room temperature to form MgH 2 , it can do so at high temperatures (above 550 K) and high pressures (above 2 MPa) [27][28][29]. MgH 2 generated under such extreme conditions is reasonably stable at room temperature.…”

“…Mg-based alloys that absorb and desorb hydrogen at relatively low temperatures are currently being developed. Such alloys include Mg-Fe [30], Mg 2 Ni [31], Mg 2 Co [32] and Mg 2 Cu [33], but they all must be heated to at least 373 K to desorb hydrogen. In addition, their hydrogen storage efficiency (4 wt% or less) is inferior to that of MgH 2 .…”