Dataset Information

Study of the Hydrogen Storage Properties and Catalytic Mechanism of a MgH₂-Na₃AlH₆ System Incorporating FeCl₃.

ABSTRACT: In this work, the catalytic effects of FeCl₃ toward the hydrogen storage properties of the MgH₂-Na₃AlH₆ composite were investigated for the first time. The temperature-programed desorption results indicated that the onset temperature of the hydrogen release of a 10 wt % FeCl₃-doped MgH₂-Na₃AlH₆ composite was ∼30 °C lower than that of the undoped MgH₂-Na₃AlH₆ composite. The addition of FeCl₃ into the MgH₂-Na₃AlH₆ composite resulted in improved absorption and desorption kinetics performance. The absorption/desorption kinetics measurements at 320 °C (under 33 and 1 atm hydrogen pressure, respectively) indicated that within 10 min, the doped sample absorbed ∼4.0 wt % and desorbed ∼1.5 wt % hydrogen. By comparison, the undoped sample absorbed only ∼2.1 wt % and desorbed only ∼0.6 wt % hydrogen under the same conditions and time. Comparably, the apparent activation energy value of the doped composite is 128 kJ/mol, which is 12 kJ/mol lower than that of the undoped composite (140 kJ/mol). The formation of the new species of MgCl₂ and Fe in the doped composite was detected from X-ray diffraction analysis after heating and absorption processes. These two components were believed to play a vital role in reducing the decomposition temperature and kinetics enhancement of the MgH₂-Na₃AlH₆ composite.

SUBMITTER: Halim Yap MFAA

PROVIDER: S-EPMC8320109 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

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Study of the Hydrogen Storage Properties and Catalytic Mechanism of a MgH2-Na3AlH6 System Incorporating FeCl3.

Halim Yap Muhammad Firdaus Asyraf Abdul MFAA Yahya Muhammad Syarifuddin MS Sazelee Noratiqah N Ali Nurul Amirah NA Mustafa Nurul Shafikah NS Sulaiman Nurul Nafiqah NN Ismail Mohammad M

ACS omega 20210715 29

In this work, the catalytic effects of FeCl3 toward the hydrogen storage properties of the MgH2-Na3AlH6 composite were investigated for the first time. The temperature-programed desorption results indicated that the onset temperature of the hydrogen release of a 10 wt % FeCl3-doped MgH2-Na3AlH6 composite was ∼30 °C lower than that of the undoped MgH2-Na3AlH6 composite. The add ...[more]

PMID: 34337234

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Project description:ObjectiveThis study aimed to reveal the protective effect of hydrogen storage nanomaterial MgH2 on radiation-induced male fertility impairment.MethodsThe characterization of MgH2 were analyzed by scanning electron microscopy (SEM) and particle size analyzer. The safety of MgH2 were evaluated in vivo and in vitro. The radioprotective effect of MgH2 on the reproductive system were analyzed in mice, including sperm quality, genetic effect, spermatogenesis, and hormone secretion. ESR, flow cytometry and western blotting assay were used to reveal the underlying mechanisms.ResultsMgH2 had an irregular spherical morphology and a particle size of approximately 463.2 nm, and the content of Mg reached 71.46%. MgH2 was safe and nontoxic in mice and cells. After irradiation, MgH2 treatment significantly protected testicular structure, increased sperm density, improved sperm motility, reduced deformity rates, and reduced the genetic toxicity. Particularly, the sperm motility were consistent with those in MH mice and human semen samples. Furthermore, MgH2 treatment could maintain hormone secretion and testicular spermatogenesis, especially the generation of Sertoli cells, spermatogonia and round sperm cells. In vitro, MgH2 eliminated the [·OH], suppressed the irradiation-induced increase in ROS production, and effectively alleviated the increase in MDA contents. Moreover, MgH2 significantly ameliorated apoptosis in testes and cells and reversed the G2/M phase cell cycle arrest induced by irradiation. In addition, MgH2 inhibited the activation of radiation-induced inflammation and pyroptosis.ConclusionMgH2 improved irradiation-induced male fertility impairment by eliminating hydroxyl free radicals. Mice fertility and function were evaluated with or without MgH2 treatment after 5 Gy irradiation. MgH2 had the ability of hydroxyl radicals scavenging and MDA suppressing in testicular tissue induced by irradiation. Further, MgH2 could participate in spermatogenesis and protect sperm development in three stages: the generation of Sertoli cells (Sox-9+), spermatogonia (Stra8+) and round sperm cells (Crem+). Moreover, MgH2 alleviated the decrease of testosterone secreted by interstitial cells after irradiation. In addition, MgH2 suppressed apoptosis, pyroptosis and inflammatory response and alleviated cell cycle arrest by mediating IR-induced ROS.

Dataset Information

Study of the Hydrogen Storage Properties and Catalytic Mechanism of a MgH₂-Na₃AlH₆ System Incorporating FeCl₃.

Publications

Study of the Hydrogen Storage Properties and Catalytic Mechanism of a MgH<sub>2</sub>-Na<sub>3</sub>AlH<sub>6</sub> System Incorporating FeCl<sub>3</sub>.

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