Recently, a new class of alloys, namely, high-entropy alloys (HEAs), started to be investigated for hydrogen storage as they can form metal hydrides. Considering that the properties of metal hydrides are greatly influenced by the type of phase formed, and chemical composition, HEAs (with their vastness of compositions) present a high potential for developing promising materials for this application. A crucial aspect in assessing the potential of these alloys is the effective compositional design and synthesis. Here, we evaluate the methods used for obtaining HEAs for hydrogen storage and, based on the most advanced discussions of phase formation and stability in HEAs, we expose some strategies for a better assessment of the vast compositional field. Moreover, we present and discuss the first attempts to model the hydrogenation properties of HEAs using thermodynamics and data science. The development of these kinds of predictive tools is paramount for exploring HEAs' potential for hydrogen storage. To date, the most promising HEA compositions can be classified into three classes: body-centered cubic HEAs, lightweight HEAs, and intermetallic HEAs.

中文翻译：

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储氢高熵合金的回顾与展望

最近，开始研究一类新的合金，即高熵合金 (HEAs) 用于储氢，因为它们可以形成金属氢化物。考虑到金属氢化物的性质受所形成的相类型和化学成分的影响很大，因此 HEA（具有广泛的成分）具有开发用于该应用的有前途的材料的巨大潜力。评估这些合金潜力的一个关键方面是有效的成分设计和合成。在这里，我们评估了用于获得用于储氢的 HEA 的方法，并基于对 HEA 中相形成和稳定性的最先进讨论，我们揭示了一些策略，以更好地评估广阔的组成领域。而且，我们展示并讨论了使用热力学和数据科学对 HEA 的氢化特性进行建模的首次尝试。开发这类预测工具对于探索 HEA 的储氢潜力至关重要。迄今为止，最有前途的 HEA 组合物可分为三类：体心立方 HEA、轻质 HEA 和金属间 HEA。