Crystallization behavior and hydrogen storage kinetics of amorphous Mg11Y2Ni2 alloy

Zhang, Q.A.; Zhang, L.X.; Wang, Q.Q.

doi:10.1016/j.jallcom.2012.11.046

Cited by 41 publications

(14 citation statements)

References 46 publications

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“…To clarify the hydrogenation mechanism, the XRD patterns of the Mg 10 YNi alloy as-cast and hydrogenated are shown in Fig. 2, indicating which is similar to other Mg-rich and Mg-RE-Ni alloys [40][41][42][43] . According to the hydrogenation amount of approximately 4.8 wt.% experimentally obtained, the hydrogen gas absorbed can be calculated to be 20 equivalents per Mg 10 YNi.…”

Section: Hydrogenation Characteristics Of Mg-y-ni Alloysmentioning

confidence: 64%

“…However, the saturated hydrogenation amount for the Mg 4 YNi alloy is only approximately 3.4 wt.% because of a relative low Mg content. For the Mg 12 YNi alloy, though a higher hydrogenation amount can be obtained, the hydrogenation process cannot be finished within 160 min due to the inadequate catalytic effect of YH 2 /YH 3 and Mg 2 Ni (or Mg 2 NiH 4 ) nanoparticles embedded in MgH 2 matrix 40,41 . In contrast, the Mg 10 YNi alloy can absorb as much as approximately 4.8 wt.% of hydrogen and accomplish the hydrogenation process within 100 min, exhibiting the best comprehensive property in terms of the hydrogenation amount and relative hydrogenation rate.…”

Section: Sample Characterizationmentioning

confidence: 99%

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Hydrogen Storage Properties and Reactive Mechanism of LiBH4/Mg10YNi-H Composite

et al. 2019

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The Mg 10 YNi alloy was hydrogenated and then coupled with LiBH 4 to form LiBH 4 /Mg 10 YNi-H reactive hydride composite. The results indicate that thermal dehydrogenation stability of LiBH 4 can be remarkably reduced by combining with Mg 10 YNi hydride. The starting and ending temperatures for hydrogen desorption from the LiBH 4 /Mg 10 YNi-H composite are approximately 275 and 430 ºC, respectively. Dehydrogenation of the LiBH 4 /Mg 10 YNi-H composite proceeds mainly in two steps with a total reaction of 12LiBH 4 + 2.5Mg 10 YNiH 20 → 24Mg + MgNi 2.5 B 2 + 2.5YB 4 + 12LiH + 43H 2. After rehydrogenation at 450 ºC under 9 MPa hydrogen pressure, the LiBH 4 /Mg 10 YNi-H composite starts to release hydrogen around 260 ºC, and as much as approximately 5.2 wt.% of hydrogen can be desorbed during the second dehydrogenation process.

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Section: Hydrogenation Characteristics Of Mg-y-ni Alloysmentioning

confidence: 64%

Section: Sample Characterizationmentioning

confidence: 99%

Hydrogen Storage Properties and Reactive Mechanism of LiBH4/Mg10YNi-H Composite

et al. 2019

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“…The influence of Y and Ni on the hydrogen absorption kinetics during the hydrogenation of Mg-20 % wt. Ni-Y alloy, Mg90Ni5Y5 and Mg80Ni10Y10 alloys, and Mg11Y2Ni2 alloy were studied in [48][49][50]. It has been established that both the catalytic effect of the Mg2Ni and YH3 phases and the crystal lattice defects formed during mechanical activation are responsible for improving the hydrogen sorption kinetics in all of the above alloys during their hydrogenation.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Sorption Properties, Thermal Stability and Kinetics of Hydrogen Desorption From the Hydride Phase of The MgH2 of a Mechanical Alloys of Magnesium with Ti, Ni and Y

Ershova

Dobrovolsky

Solonin

2020

PCSS

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The mechanical alloys-composite MАs (Mg +10 % wt.Ti + 5 % wt.Y and Mg +10 % wt.Ni + 5 % wt.Y) were synthesized. The phase content, microstructure, the thermal stability, kinetics of hydrogen desorption from the MgH2 hydride phase of the obtained MAs were studiedby using XRD, SEM, TDS methods. It has been established that the addition of Ti + Y and Ni + Y to magnesium leads to significant improvement in the kinetics of hydrogen desorption from the MgH2 hydride phase, which is evidenced by a significant reduction (in 6 and 15 times)in the time of release of all hydrogen from MA1 and MA2, respectively. Due to, Ti, Ni,Y alloying, the decrease in the thermodynamic stability of MgH2 is not found.

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“…Cui et al prepared a Ti-based compounds coating on the surface of Mg particles by impregnation method of pre-milled Mg powders in TiCl 3 tetrahydrofuran solution for only 5 h [12], which resulted in significant reduction of starting desorption temperature of MgH 2 down to 175°C. Additionally, it is found that some catalytic nanosized additives could be readily formed through hydrogenation of multi-component Mg-base alloys [15][16][17]. For example, the Mg 3 CeNi 0.1 alloy with D0 3 structure was hydrogenated into the nanocomposite of MgH 2 , nanoscale CeH 2.73 and Ni, in which the MgH 2 could absorb hydrogen at ambient temperature [17].…”

Section: Introductionmentioning

confidence: 99%