Hydrogen generation via hydrolysis of H-CaMg 2 and H-CaMg 1.9 Ni 0.1

Controllable Hydrolysis Performance of MgLi Alloys and Their Hydrides

“…The Activation Energy (Ea) is the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction, and a lower Ea value generally indicates a higher reaction activity. Ea of MgLi-10 wt.% EG, sawed MgLi RBM and sawed MgLi RBMH is 52, 10.6 and 24.6 kJ/ mol, respectively; Ea of sawed MgLi RBMH is lower than H-CaMg 1.9 Ni 0.1 (32.9 kJ/mol) [14] and higher than H-30 wt.% CaÀ Mg (8.3 kJ/mol). [39] In this work, the results show that the sawed MgLi RBM for 8 h has a better kinetic in deionized water solution with minimum activation energy, which means a highest reacion activaty.…”

“…[8] In recent years, main methods for producing hydrogen mainly include electrolytic water decomposition, [9] photocatalytic water decomposition, [10] biological fermentation [11] and hydrolysis. [12] The hydrolysis of metals, metal hydrides [13][14][15] or borohydrides [16][17][18] shows a stable reaction, pollution-free, high hydrogen production rate and high hydrogen purity, which promote the hydrolysis as a very promising hydrogen production method. [19] Among metal borohydrides, sodium borohydride (NaBH 4 ) has high hydrogen producing capacity (about 21.2 wt.%, without water included), but the hydrolysis kinetics of NaBH 4 in pure water is sluggish, and expensive catalysts are required.…”

“…Various kinds of metal/metal hydride have been investigated for hydrolysis, such as Mg, [22] LiH, [23,24] H-CaMg 2 . [14] Hydrogen production by hydrolysis of MgH 2 can obtain 15.2 wt.% hydrogen, [25] and MgH 2 also has a much lower cost than metal borohydride. The formation of Mg (OH) 2 and Al(OH) 3 passivation layers prevent further contact of the Mg-based or Al-based material with the solution.…”

Effect of doped Ni-Bi-B alloy on hydrogen generation performance of Al-InCl3

“…Comparing with the above methods, hydrogen generation by metal hydrolysis is a very important method, since metals are easy to store and convenient to transport. For example, hydrogen was produced from water by reacting with Mg-based materials [11][12][13] or Al-based materials [14] etc. Furthermore, Al is an abundant element on the earth with a low-cost, and can react with water to produce 1245 mL of hydrogen per gram Al (at standard state).…”

Microstructure and hydrogen storage kinetics of Mg89RE11 (RE = Pr, Nd, Sm) binary alloys

“…The hydrogen storage capacity of La 2 Mg 17 reaches 6 wt% at the temperature of 350 C. 30 The Mg 3 La compound prepared by induction melting can absorb 2.89 wt% of hydrogen reversibly at 296 C. 31 Wu et al 32 investigated the hydrogen storage properties and phase transitions of Mg 17 Ba 2 , which has reversible hydrogen capacity of 4.0 wt% H 2 . Ma et al 33,34 proposed the addition of Ni to the CaMg 2 -based alloys resulted in room-temperature hydrogen absorption without an activation process, and a maximum hydrogen-absorption capacity of 5.65 wt%. Moreover, dualtuning effects of the thermodynamics and kinetics for Mgbased materials is one of the key issues for hydrogen economy and hydrogen storage materials.…”