Herein, a novel flower-like Ni MOF with good thermostability is introduced into MgH₂ for the first time, and which demonstrates excellent catalytic activity on improving hydrogen storage performance of MgH₂. The peak dehydrogenation temperature of MgH₂-5 wt.% Ni MOF is 78 °C lower than that of pure MgH₂. Besides, MgH₂-5 wt.% Ni MOF shows faster de/hydrogenation kinetics, releasing 6.4 wt% hydrogen at 300 °C within 600 s and restoring about 5.7 wt% hydrogen at 150 °C after dehydrogenation. The apparent activation energy for de/hydrogenation reactions are calculated to be 107.8 and 42.8 kJ/mol H₂ respectively, which are much lower than that of MgH₂ doped with other MOFs. In addition, the catalytic mechanism of flower-like Ni MOF is investigated in depth, through XRD, XPS and TEM methods. The high catalytic activity of flower-like Ni MOF can be attributed to the combining effect of in-situ generated Mg₂Ni/Mg₂NiH₄, MgO nanoparticles, amorphous C and remaining layered Ni MOF. This research extends the knowledge of elaborating efficient catalysts via MOFs in hydrogen storage materials.

在此，首次将具有良好热稳定性的新型花状Ni MOF引入到MgH _{2中，并在提高MgH 2}的储氢性能方面表现出优异的催化活性。_{MgH 2} -5 wt.% Ni MOF的峰值脱氢温度比纯MgH ₂低78℃ 。此外，MgH ₂ -5 wt.% Ni MOF表现出更快的脱氢动力学，在300 ℃下600 s内释放6.4 wt%的氢，脱氢后在150 ℃恢复约5.7 wt%的氢。经计算，脱氢反应的表观活化能分别为107.8和42.8 kJ/mol H ₂，远低于MgH _{2 。}掺杂其他 MOF。此外，通过XRD、XPS和TEM等方法深入研究了花状Ni MOF的催化机理。花状Ni MOF的高催化活性可归因于原位生成的Mg ₂ Ni/Mg ₂ NiH ₄、MgO纳米颗粒、无定形C和剩余的层状Ni MOF的结合作用。这项研究扩展了在储氢材料中通过 MOF 制备高效催化剂的知识。