氢气储存
化学
无定形固体
催化作用
纳米颗粒
化学工程
氢
纳米技术
有机化学
材料科学
工程类
作者
Liuting Zhang,Yan Zhang,Fuying Wu,Yiqun Jiang,Yijing Wang
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2023-03-29
卷期号:62 (14): 5845-5853
被引量:4
标识
DOI:10.1021/acs.inorgchem.3c00567
摘要
In the paper, we synthesized amorphous NiCoB nanoparticles by a simple chemical reduction method and employed them as high-activity catalysts to considerably improve the hydrogen storage properties of MgH2. The MgH2-NiCoB composite quickly absorbed 3.6 wt % H2 at a low temperature of 85 °C and released 5.5 wt % H2 below 270 °C within 600 s. It is worth noting that the hydrogenation activation energy was reduced to 33.0 kJ·mol-1. Detailed microstructure analysis reveals that MgB2, Mg2Ni/Mg2NiH4, and Mg2Co/Mg2CoH5 were in situ generated during the first de/absorption cycle and dispersed at the surface of NiCoB. These active ingredients created lots of boundary interfaces to facilitate the hydrogen diffusion and destabilize the Mg-H bonds, thus decreasing the kinetic barriers. This work provides support for a promising catalytic effect of amorphous NiCoB on de/absorption reactions of MgH2, showing new ways for designing Mg-based hydrogen storage systems toward practical application.
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