State of the art multi-strategy improvement of Mg-based hydrides for hydrogen storage
State of the art multi-strategy improvement of Mg-based hydrides for hydrogen storage
复制标题
最先进的镁基氢化物储氢多策略改进
DOI：
10.1016/j.jallcom.2018.12.217
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发表时间：
2019
影响因子：
6.2
通讯作者：
Li Liquan
中科院分区：
文献类型：
--
作者：
Zhang Jiguang;Zhu Yunfeng;Yao Linglong;Xu Cheng;Liu Yana;Li Liquan
镁作为一种具有代表性的轻金属，具有储氢量大、成本低、天然丰富等优点，是一种很有前途的氢载体。MgH2的固有缺点包括不理想的热力学性质和缓慢的吸附动力学。本文综述了镁作为氢载体在实际应用中的主要进展，重点介绍了镁的催化、纳米化、合金化、表面改性、非晶化和复合化等多策略改性技术。目前的理解的基本原则，氢与这些轻化合物的相互作用进行了总结。通过具体的制备方法，阐明了改性方法的耦合效应。从战略角度比较了改性MgH2体系的综合性能。实验方法，特别是开创性的技术或方法，进行了比较。镁基金属间化合物的改性仍存在一些困难，这就给我们提出了以下问题：如何制备出粒径小于几纳米的镁基金属间化合物？如何通过更直接的观察测量来保持已建立的催化增强机制或复合协同效应？如何保持化学稳定性以对抗环境大气？展望了MgH2体系改性的发展方向，特别是提高储氢性能的途径。
As a representative light metal, magnesium is promising to be used as a hydrogen carrier owing to its high hydrogen capacity, low cost and natural abundance. The intrinsic drawbacks of MgH2include the undesirable thermodynamic properties and sluggish sorption kinetics. In this paper, major progresses towards the practical use of magnesium as a hydrogen carrier are reviewed with a stress on the multi-strategy modifying techniques, including catalyzing, nanosizing, alloying, surface modification, amorphization and compositing. Current understanding of the fundamental principles governing the interaction of hydrogen with these light compounds is also summarized. Lights are shed on the coupling effect of the modifying methods through particular preparation methods. Integral performances of the modified MgH2systems are compared from a strategical viewpoint. Experimental approaches, especially the pioneering techniques or methods, have been compared. Some difficulties of modifying Mg-based hydrides still remain, posing the following questions to us: how to prepare Mg-based intermetallic compounds with particle size below several nanometers? How to keep a well-established catalysis-enhancement mechanism or compositing synergistic effect through a more direct observation measurement? How to maintain chemical stability against environmental atmosphere? Future approaches about modifying MgH2system, especially the enhancement of hydrogen storage performance, have been discussed.