Ball Milling Innovations Advance Mg-Based Hydrogen Storage Materials Towards Practical Applications.

Mg-based materials have been widely studied as potential hydrogen storage media due to their high theoretical hydrogen capacity, low cost, and abundant reserves. However, the sluggish hydrogen absorption/desorption kinetics and high thermodynamic stability of Mg-based hydrides have hindered their practical application. Ball milling has emerged as a versatile and effective technique to synthesize and modify nanostructured Mg-based hydrides with enhanced hydrogen storage properties.

Modification of MgH hydrogen storage performance by nickel-based composite catalyst Ni/NiO.

In this study, the Ni/NiO catalyst was demonstrated to enhance the hydrogen storage performance of MgH. The dehydrogenation of MgH+10 wt% Ni/NiO started at approximately 180 °C, achieving 5.83 wt% of dehydrogenation within 10 min at 300 °C.

Enhanced Oxygen Storage Capacity of Porous CeO by Rare Earth Doping.

CeO is an important rare earth (RE) oxide and has served as a typical oxygen storage material in practical applications. In the present study, the oxygen storage capacity (OSC) of CeO was enhanced by doping with other rare earth ions (RE, RE = Yb, Y, Sm and La). A series of Undoped and RE-doped CeO with different doping levels were synthesized using a solvothermal method following a subsequent calcination process, in which just Ce(NO)∙6HO, RE(NO)∙nHO, ethylene glycol and water were used as raw materials.

Hydrogen Storage Performance of Mg/MgH and Its Improvement Measures: Research Progress and Trends.

Due to its high hydrogen storage efficiency and safety, Mg/MgH stands out from many solid hydrogen storage materials and is considered as one of the most promising solid hydrogen storage materials. However, thermodynamic/kinetic deficiencies of the performance of Mg/MgH limit its practical applications for which a series of improvements have been carried out by scholars. This paper summarizes, analyzes and organizes the current research status of the hydrogen storage performance of Mg/MgH and its improvement measures, discusses in detail the hot studies on improving the hydrogen storage performance of Mg/MgH (improvement measures, such as alloying treatment, nano-treatment and catalyst doping), and focuses on the discussion and in-depth analysis of the catalytic effects and mechanisms of various metal-based catalysts on the kinetic and cyclic performance of Mg/MgH.

NiFe/BC nanocatalysts based on biomass charcoal self-reduction achieves excellent hydrogen storage performance of MgH.

Bimetallic catalysts offer unique advantages for improving the hydrogen storage performance of MgH. Herein, NiFe/BC nanocatalysts were prepared a simple solid phase reduction method using a low-cost biomass charcoal (BC) material as the carrier. The onset temperature of hydrogen release for the MgH + 10 wt% NiFe/BC composite was 184.

Regulation of Kinetic Properties of Chemical Hydrogen Absorption and Desorption by Cubic KMoO on Magnesium Hydride.

Transition metal catalysts are particularly effective in improving the kinetics of the reversible hydrogen storage reaction for light metal hydrides. Herein, KMoO microrods were prepared using a simple evaporative crystallization method, and it was confirmed that the kinetic properties of magnesium hydride could be adjusted by doping cubic KMoO into MgH. Its unique cubic structure forms new species in the process of hydrogen absorption and desorption, which shows excellent catalytic activity in the process of hydrogen storage in MgH.

Improvement of the hydrogen storage characteristics of MgH with a flake Ni nano-catalyst composite.

Magnesium hydride (MgH2) is considered to be one of the most promising hydrogen storage materials owing to its safety profile, low cost and high hydrogen storage capacity. However, its slow kinetic performance and thermal stability limit the possibility of practical applications. Herein, it is confirmed that the hydrogen storage performance of MgH2 can be effectively improved via doping with a flake Ni nano-catalyst.