Dataset Information

Boosting Hydrogen Storage Performance of MgH₂ by Oxygen Vacancy-Rich H-V₂O₅ Nanosheet as an Excited H-Pump.

ABSTRACT: MgH₂ is a promising high-capacity solid-state hydrogen storage material, while its application is greatly hindered by the high desorption temperature and sluggish kinetics. Herein, intertwined 2D oxygen vacancy-rich V₂O₅ nanosheets (H-V₂O₅) are specifically designed and used as catalysts to improve the hydrogen storage properties of MgH₂. The as-prepared MgH₂-H-V₂O₅ composites exhibit low desorption temperatures (T_onset = 185 °C) with a hydrogen capacity of 6.54 wt%, fast kinetics (E_a = 84.55 ± 1.37 kJ mol^-1 H₂ for desorption), and long cycling stability. Impressively, hydrogen absorption can be achieved at a temperature as low as 30 °C with a capacity of 2.38 wt% within 60 min. Moreover, the composites maintain a capacity retention rate of ~ 99% after 100 cycles at 275 °C. Experimental studies and theoretical calculations demonstrate that the in-situ formed VH₂/V catalysts, unique 2D structure of H-V₂O₅ nanosheets, and abundant oxygen vacancies positively contribute to the improved hydrogen sorption properties. Notably, the existence of oxygen vacancies plays a double role, which could not only directly accelerate the hydrogen ab/de-sorption rate of MgH₂, but also indirectly affect the activity of the catalytic phase VH₂/V, thereby further boosting the hydrogen storage performance of MgH₂. This work highlights an oxygen vacancy excited "hydrogen pump" effect of VH₂/V on the hydrogen sorption of Mg/MgH₂. The strategy developed here may pave a new way toward the development of oxygen vacancy-rich transition metal oxides catalyzed hydride systems.

SUBMITTER: Ren L

PROVIDER: S-EPMC11231122 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Boosting Hydrogen Storage Performance of MgH2 by Oxygen Vacancy-Rich H-V2O5 Nanosheet as an Excited H-Pump.

Ren Li L Li Yinghui Y Li Zi Z Lin Xi X Lu Chong C Ding Wenjiang W Zou Jianxin J

Nano-micro letters 20240321 1

MgH2 is a promising high-capacity solid-state hydrogen storage material, while its application is greatly hindered by the high desorption temperature and sluggish kinetics. Herein, intertwined 2D oxygen vacancy-rich V2O5 nanosheets (H-V2O5) are specifically designed and used as catalysts to improve the hydrogen storage properties of MgH2. The as-prepared MgH2-H-V2O5 composites exhibit low desorptio ...[more]

PMID: 38512500

Similar Datasets

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

Boosting Hydrogen Storage Performance of MgH₂ by Oxygen Vacancy-Rich H-V₂O₅ Nanosheet as an Excited H-Pump.

Publications

Boosting Hydrogen Storage Performance of MgH<sub>2</sub> by Oxygen Vacancy-Rich H-V<sub>2</sub>O<sub>5</sub> Nanosheet as an Excited H-Pump.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets