Oxygen Vacancy-Rich 2D TiO2 Nanosheets: A Bridge Toward High Stability and Rapid Hydrogen Storage Kinetics of Nano-Confined MgH2,Nano-Micro Letters

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Oxygen Vacancy-Rich 2D TiO2 Nanosheets: A Bridge Toward High Stability and Rapid Hydrogen Storage Kinetics of Nano-Confined MgH2
Nano-Micro Letters ( IF 31.6 ) Pub Date : 2022-07-15 , DOI: 10.1007/s40820-022-00891-9
Li Ren _{1,

2,

3} , Wen Zhu ₁ , Yinghui Li ₁ , Xi Lin ₁ , Hao Xu ₁ , Fengzhan Sun ₁ , Chong Lu ₄ , Jianxin Zou _{1,

2,

3}

Affiliation

A MgH₂/TiO₂ heterostructure with nano MgH₂ assembled on oxygen vacancy-rich 2D TiO₂ nanosheets was successfully fabricated via a simple solvothermal strategy.
The MgH₂/TiO₂ heterostructure shows rapid desorption kinetics, low dehydrogenation temperature, and excellent cycling stability.
In situ HRTEM observations and ex situ XPS analyses reveal that multi-valance of Ti species, presence of abundant oxygen vacancies, formation of catalytic Mg-Ti oxides, and confinement of TiO₂ nanosheets, contribute to the high stability and kinetically accelerated hydrogen sorption performances of Mg.

中文翻译：

富氧空位二维 TiO2 纳米片：通往纳米限制 MgH2 的高稳定性和快速储氢动力学的桥梁

通过简单的溶剂热策略，成功地在富含氧空位的二维 TiO ₂纳米片上组装了具有纳米 MgH ₂的 MgH ₂ /TiO ₂异质结构。
MgH ₂ /TiO ₂异质结构显示出快速的解吸动力学、低脱氢温度和优异的循环稳定性。
原位 HRTEM 观察和非原位 XPS 分析表明，Ti 物种的多价态、大量氧空位的存在、催化 Mg-Ti 氧化物的形成以及 TiO ₂纳米片的限制有助于高稳定性和动力学加速的氢吸附性能镁。

更新日期：2022-07-16

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