Three-dimensionally ordered macroporous (3DOM) materials have attracted sizable attention due to their unique interconnected and periodically arranged macroporous structures. 3DOM TiO₂ prepared by colloidal crystal template method was firstly applied to enhance the hydrogen storage properties of MgH₂. TiO₂ nanoparticles with the size of 5 ∼ 10 nm were supported on 3DOM structure with ordered and homogeneous pores about 150 nm. MgH₂-5 wt% 3DOM TiO₂ can quickly absorb 4.17 wt% H₂ within 1800 s at 100 °C and desorb 5.75 wt% H₂ at 300 °C within 1000 s. Ultra-fine and uniformly dispersed TiO₂ particles can provide numerous reactive sites for the hydrogen de/absorption of MgH₂. In addition, the electron transfer on contact interface between MgH₂ and TiO₂ can be observed by the binding energy shift of TiO₂, and further be verified by work function and charge density calculations. Therefore, the in-situ formed multiple valence Ti can be an intermediate medium for transformation from MgH₂ to Mg, which leads to the destabilization of MgH₂ and ultimately promotes dehydrogenation. This finding will attract more attention to elaborate highly efficient catalysts based on 3DOM structure in hydrogen storage materials.

三维有序大孔（3DOM）材料由于其独特的相互连接和周期性排列的大孔结构而引起了相当大的关注。首次将胶体晶体模板法制备的3DOM TiO _{2用于提高MgH 2}的储氢性能。尺寸为5～10 nm的TiO _{2纳米颗粒负载在3DOM结构上，具有约150 nm的有序均匀孔隙。}MgH ₂ -5 wt% 3DOM TiO ₂在100℃下1800 s内可快速吸附4.17 wt% H ₂，在300℃下1000 s内可快速脱附5.75 wt% H _{2 。}超细且均匀分散的TiO _{2颗粒可以为MgH 2}的氢解吸/吸收提供许多反应位点。此外，MgH ₂和TiO _{2接触界面上的电子转移可以通过TiO 2}的结合能位移来观察，并通过功函数和电荷密度计算进一步验证。因此，原位形成的多价Ti可以作为MgH ₂向Mg转变的中间介质，导致MgH ₂的不稳定并最终促进脱氢。这一发现将吸引更多人关注基于 3DOM 结构的储氢材料中的高效催化剂。