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Modification of MgH2 hydrogen storage performance by nickel-based composite catalyst Ni/NiO
Heliyon ( IF 3.4 ) Pub Date : 2024-05-04 , DOI: 10.1016/j.heliyon.2024.e30688
Wenxuan Li 1 , Xinglin Yang 1 , Quanhui Hou 2 , Xiaohui Lu 1 , Jie Kong 1 , Jianye Su 1
Affiliation  

In this study, the Ni/NiO catalyst was demonstrated to enhance the hydrogen storage performance of MgH2. The dehydrogenation of MgH2+10 wt% Ni/NiO started at approximately 180 °C, achieving 5.83 wt% of dehydrogenation within 10 min at 300 °C. Completely dehydrogenated, MgH2 began to rehydrogenate at about 50 °C, absorbing about 4.56 wt% of hydrogen in 10 min at 150 °C. In addition, the activation energies of dehydrogenation and rehydrogenation of MgH2+10 wt% Ni/NiO were 87.21 and 34.84 kJ/mol. During the dehydrogenation/rehydrogenation cycle, Mg2Ni/Mg2NiH4 could promote hydrogen diffusion, thus enhancing the hydrogen storage performance of Mg/MgH2.

中文翻译:


镍基复合催化剂 Ni/NiO 对 MgH2 储氢性能的改性



在这项研究中,Ni/NiO 催化剂被证明可以提高 MgH2 的储氢性能。MgH2+10 wt% Ni/NiO 的脱氢开始于大约 180 °C,在 300 °C 下 10 分钟内达到 5.83 wt% 的脱氢。 完全脱氢后,MgH2 在约 50 °C 时开始再氢化,在 150 °C 下 10 分钟内吸收约 4.56 wt% 的氢气。 此外,MgH2+10 wt% Ni/NiO 的脱氢和再氢化活化能分别为 87.21 和 34.84 kJ/mol。在脱氢/再加氢循环过程中,Mg2Ni/Mg2NiH4 可以促进氢扩散,从而增强 Mg/MgH2 的储氢性能。
更新日期:2024-05-04
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