A mixture with the composition of MgH₂–10 wt% (Mg(AlH₄)₂-0.5TiF₄) (denoted as Mg-Al-Ti-F-doped MgH₂) is designed and prepared by high-energy ball milling under the hydrogen pressure of 60 bar for 12 h. During the milling, a chemical reaction occurs between Mg(AlH₄)₂ and TiF₄ to generate in situ Al₃Ti, MgF₂ and Al, which work together to induce a reduction of greater than 100 °C in the dehydrogenation temperature. At 275 °C, the Mg-Al-Ti-F-doped MgH₂ rapidly releases 6.3 wt% H₂ within 10 min in an isothermal experiment, while no appreciable hydrogen release is observed for the pristine MgH₂ under identical conditions. The dehydrogenated Mg-Al-Ti-F-doped sample starts to take up hydrogen at room temperature with the 6.3 wt% amount of H₂ at 150 °C, which is greatly superior to that of the pristine sample. A comprehensive kinetic analysis reveals that the superior functionality of the in situ formed Al₃Ti, MgF₂ and Al are mainly attributed to the following two factors: acting as nucleation centers and reducing the activation energy of growth.

设计并通过在以下条件下进行高能球磨来制备具有MgH ₂ -10 wt％（Mg（AlH ₄）₂ -0.5TiF ₄）组成的混合物（表示为Mg-Al-Ti-F掺杂的MgH ₂）。氢气压力为60 bar，持续12 h。在研磨过程中，Mg（AlH ₄）₂和TiF ₄之间发生化学反应，原位生成Al ₃ Ti，MgF ₂和Al，它们共同作用导致脱氢温度降低超过100°C。在275°C下，掺杂Mg-Al-Ti-F的MgH ₂快速释放6.3 wt％的H ₂在等温实验中的10分钟内，没有发现在相同条件下原始MgH ₂释放出明显的氢。掺有Mg-Al-Ti-F的脱氢样品在室温下开始吸收氢气，在150°C下的6.3 wt％H ₂含量要大大优于原始样品。全面的动力学分析表明，原位形成的Al ₃ Ti，MgF ₂和Al的优异功能主要归因于以下两个因素：充当成核中心并降低生长的活化能。