Remarkable catalytic effect of Ni and ZrO2nanoparticles on the hydrogen sorption properties of MgH2
Remarkable catalytic effect of Ni and ZrO2nanoparticles on the hydrogen sorption properties of MgH2
复制标题
Ni和ZrO2纳米粒子对MgH2吸氢性能的显着催化作用
DOI：
10.1016/j.ijhydene.2021.11.102
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发表时间：
2022
影响因子：
7.2
通讯作者：
Yu Hao
中科院分区：
文献类型：
--
作者：
Tome Kudzaishe Caren;Xi Senliang;Fu Yuanyi;Lu Chang;Lu Ni;Guan Meili;Zhou Shixue;Yu Hao
In the present study, the catalytic effect of Ni and ZrO2nanoparticles on the hydrogen absorption and desorption properties of MgH2has been investigated. The MgH2nanocomposites were prepared by high-energy ball-milling. The morphology, phase structure, thermal behavior, and hydrogen storage properties of the materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), temperature-programmed desorption (TPD), differential scanning calorimetry (DSC), and the pressure-composition temperature (PCT) methods. ZrO2and Ni nanoparticles were homogenously dispersed into the MgH2matrix. The calculated apparent activation energy for dehydrogenation was 63.4 kJ/mol, which was decreased by 80.1 kJ/mol compared to that of as-milled MgH2. As a result, MgH2+5 wt.%Ni+5 wt.%ZrO2demonstrated improved dehydrogenation and hydrogenation kinetics at 310 °C. The MgH2+5 wt.%Ni+5 wt.%ZrO2sample released about 6.83 wt.% and absorbed about 6.10 wt.% in less than 30 min. Therefore, the co-catalysis of Ni and ZrO2significantly enhances the hydrogenation and dehydrogenation properties of MgH2.
