As two important members of complex hydrides, Mg(BH₄)₂ and NaBH₄ have a high gravimetric capacity (14.9 and 10.8 ​wt%, respectively). In this study, the Mg(BH₄)₂ was synthesized by the ion exchange method. Afterwards, the Mg(BH₄)₂ and NaBH₄ composites with different amounts (30, 40 and 50 ​wt%) of NdF₃ were prepared by mechanical milling. Effects of the NdF₃ on the microstructural evolution and hydrogen storage properties were investigated. The results show that NdF₃ catalyst can significantly improve the dehydrogenation kinetics of the eutectic composites of NaBH₄–Mg(BH₄)₂. The onset hydrogen desorption temperature of the composites is about 88.6 ​°C, which is about 110 ​°C lower than that of Mg(BH₄)₂ and NaBH₄ composites. Mg(BH₄)₂–NaBH₄-0.5NdF₃ composites can released 5.2 ​wt% H₂ at 250 ​°C within 30 ​min, and the dehydrogenation capacity is significantly higher than that of Mg(BH₄)₂–NaBH₄ composites. The analysis of the dehydrogenation mechanism reveals that NdF₃ takes participate in the reaction to generate NaMgF₃ to promote the dehydrogenation reaction process of the composites.

作为复合氢化物的两个重要成员，Mg(BH ₄ ) ₂和 NaBH ₄具有很高的重量比容量（分别为 14.9 和 10.8 wt%）。在本研究中，Mg(BH ₄ ) ₂是通过离子交换法合成的。然后，通过机械研磨制备了具有不同量（30、40和50wt%）NdF ₃的Mg(BH ₄ ) ₂和NaBH ₄复合材料。研究了 NdF ₃对显微结构演变和储氢性能的影响。结果表明，NdF ₃催化剂可以显着改善 NaBH ₄ -Mg(BH ₄ ) ₂共晶复合材料的脱氢动力学。复合材料的氢开始解吸温度约为88.6℃，比Mg(BH ₄ ) ₂和NaBH ₄复合材料低约110℃ 。Mg(BH ₄ ) ₂ –NaBH ₄ -0.5NdF ₃复合材料在250℃下30分钟内可释放5.2wt% H ₂，脱氢能力明显高于Mg(BH ₄ ) ₂ –NaBH ₄复合材料。脱氢机理分析表明，NdF ₃参与反应生成NaMgF ₃，促进了复合材料的脱氢反应过程。