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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Hydrogen storage in 2NaBH_4 + MgH_2 mixtures: Destabilization by additives and nanoconflnement
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Hydrogen storage in 2NaBH_4 + MgH_2 mixtures: Destabilization by additives and nanoconflnement

机译：2NaBH_4 + MgH_2混合物中的氢存储：通过添加剂和纳米约束来破坏稳定

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摘要

We focus on the H_2 desorption properties of the 2NaBH_4 + MgH_2 system destabilized by different methods. Nanostructured powder mixtures were prepared by ball milling the starting hydrides and nanoconfined reactive composites were obtained by melting infiltration of the hydrides into a Si-based SBA-15 support. NbF_5 was tested as catalyst in both the preparations.Structural characterization by X Ray Diffraction and Transmission Electron Microscopy allowed evaluating the successful synthesis of SBA15 matrix, the microstructural features of ball milled and nanoconfined hydrides as well as the success of infiltration process. The evaluation of the sorption properties, by manometric Sievert-type apparatus and thermal desorption spectroscopy, revealed the efficiency of the hydride destabilization, obtained by the different routes, in decreasing the hydrogen release temperature and improving desorption kinetics.
机译：我们关注通过不同方法失稳的2NaBH_4 + MgH_2系统的H_2解吸特性。通过球磨起始氢化物制备纳米结构粉末混合物，并通过将氢化物浸入硅基SBA-15载体中进行熔融获得纳米约束的反应性复合材料。 NbF_5在这两种制剂中均作为催化剂进行了测试。通过X射线衍射和透射电子显微镜对结构进行表征，可以评估SBA15基质的成功合成，球磨和纳米级氢化物的微观结构特征以及渗透过程的成功性。通过测压Sievert型仪器和热脱附光谱对吸附性能的评估表明，通过不同途径获得的氢化物去稳定作用在降低氢释放温度和改善解吸动力学方面是有效的。

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