Enhancing hydrogen sorption in MgH2 by controlling particle size and contact of Ni catalysts
Enhancing hydrogen sorption in MgH2 by controlling particle size and contact of Ni catalysts
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通过控制镍催化剂的颗粒尺寸和接触来增强 MgH2 中的氢吸附
DOI：
10.1007/s12598-018-1087-x
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发表时间：
2021-04-01
期刊：
影响因子：
8.8
通讯作者：
Li, Yong-Tao
中科院分区：
文献类型：
--
作者：
Si, Ting-Zhi;Zhang, Xue-Yang;Li, Yong-Tao
以MgH2为原料，通过改变Ni颗粒尺寸，在不同条件下球磨制备了MgH2催化剂，并对MgH2催化剂的吸氢性能进行了对比研究，以揭示MgH2与金属催化剂之间的紧密接触对其吸氢性能的影响。结果表明，Mg +纳米Ni（5at%）复合材料不仅使MgH2的起始脱附温度降低了约180 °C，而且使MgH2的吸附动力学性能提高了16倍。这种显着的动力学增强可以解释的上级催化效果的Ni存在于复合材料，高度依赖于其颗粒大小和它的密切接触MgH 2。
A comparative study based on MgH 2 ball-milled with altered Ni particle sizes under different conditions was conducted to reveal the effect of close contact between hydrides and metal catalysts on their hydrogen sorption properties. It is found that the Mg + nano-Ni (5 at%) composites not only exhibit a substantial decreased onset desorption temperature by approximately 180 °C but also dramatically enhance the absorption kinetics by sixteen times in comparison with those of pure MgH 2 . This remarkable kinetics enhancement can be explained by the superior catalytic effect of Ni present in composites that highly depends on its particle size and its close contact with MgH 2 .