Tailoring MgH2 for hydrogen storage through nanoengineering and catalysis

Insights into an Amorphous NiCoB Nanoparticle-Catalyzed MgH2 System for Hydrogen Storage

“…9−11 Unfortunately, the sluggish kinetics and poor thermodynamic stability pose a critical challenge to its further application. 12,13 Experimental results confirmed that these drawbacks could be addressed using strategies like nanosizing, 14,15 alloying, 16,17 and doping catalysts. 18−20 In terms of the catalyst design, it has been shown that the sluggish kinetics can be to some extent improved by the introduction of transition metals, 21−23 intermetallic compounds, 24,25 and carbon materials.…”

“…Hydrogen energy with high mass-energy density and non-pollution combustion products is conducive to liberate the energy dependence on fossil fuels and provide creativity for green energy development. , Hydrogen storage technology occupies an important position in the hydrogen energy industry. , The current hydrogen storage methods are mainly divided into high-pressure gaseous storage, hypothermal liquid storage, and solid-state storage. , Among them, storing hydrogen in solid-state materials allows operation at moderate pressures and temperatures with high hydrogen capacity. , For instance, MgH 2 as a representative metal hydride provides cracking features such as high storage capacity (7.6 wt %), high energy density (9 MJ/kg), superior reversibility, and low cost. − Unfortunately, the sluggish kinetics and poor thermodynamic stability pose a critical challenge to its further application. , Experimental results confirmed that these drawbacks could be addressed using strategies like nanosizing, , alloying, , and doping catalysts. − In terms of the catalyst design, it has been shown that the sluggish kinetics can be to some extent improved by the introduction of transition metals, − intermetallic compounds, , and carbon materials. − …”

In situ creation of a catalytic multiphase and multiscale surroundings for remarkable hydrogen storage performance of MgH2

“…[19][20][21] Several strategies have been proposed and developed, including alloying, catalyzing, compositing, and nanostructuring, as well as their combination effects, to improve reaction thermodynamics and kinetics for hydrogen storage in Mg/MgH 2 . [22][23][24][25][26][27][28] Among them, catalysis has been proven particularly effective in reducing the operating temperatures and enhancing the reaction kinetics of hydrogen sorption by Mg/MgH 2 . [29][30][31][32][33] As typical d-and f-block elements, transition metals and rare earth metals display superior catalytic activity for the H 2 dissociation and are therefore frequently used as catalysts for hydrogen storage in Mg/MgH 2 .…”

“…19–21 Several strategies have been proposed and developed, including alloying, catalyzing, compositing, and nanostructuring, as well as their combination effects, to improve reaction thermodynamics and kinetics for hydrogen storage in Mg/MgH 2 . 22–28 Among them, catalysis has been proven particularly effective in reducing the operating temperatures and enhancing the reaction kinetics of hydrogen sorption by Mg/MgH 2 . 29–33…”

Nonisothermal and Isothermal Hydrogen Storage Behaviors of MgH2‐Based Composites Catalyzed by Carbon Isomeric Catalysts: Lightweight and Efficient Catalysis to Achieve High Capacity of Hydrogen Storage

“…Nano-/amorphous process can refine the structure, increase the diffusion channels, and shorten the diffusion paths, which is key to improving the H 2 absorption/desorption rates. [13,14] Orim et al believed that the development and design of nano-or atomic alloys using micromachining technology is an important means to improve the properties of Mg-based hydrogen storage alloys, and the nanocrystalline boundary region in the system significantly affected the hydrogen absorption/ desorption properties. [15,16] For example, the nanostructure of hydride PdHx increases the solubility of H 2 at the nanocrystalline boundary and the diffusion rate of H. [17] We have tried to prepare nanocrystalline Mg-rich alloy thin strip by solution rapid quenching, which can increase the specific surface area, shorten the diffusion path, and improve the hydrogen absorption/ desorption characteristics.…”