标题
作者
作者:Ouyang, LZ (Ouyang, Liuzhang)[1,2,3 ]; Ma, ML (Ma, Miaolian)[1,2 ]; Huang, MH (Huang, Minghong)[1,2 ]; Duan, RM (Duan, Ruoming)[1,2 ]; Wang, H (Wang, Hui)[1,2,3 ]; Sun, LX (Sun, Lixian)[4 ]; Zhu, M (Zhu, Min)[1,2,3 ]
期刊信息
摘要
Due to its relatively low cost, high hydrogen yield, and environmentally friendly hydrolysis byproducts, magnesium hydride (MgH2) appears to be an attractive candidate for hydrogen generation. However, the hydrolysis reaction of MgH2 is rapidly inhibited by the formation of a magnesium hydroxide passivation layer. To improve the hydrolysis properties of MgH2-based hydrides we investigated three different approaches: ball milling, synthesis of MgH2-based composites, and tuning of the solution composition. We demonstrate that the formation of a composite system, such as the MgH2/LaH3 composite, through ball milling and in situ synthesis, can improve the hydrolysis properties of MgH2 in pure water. Furthermore, the addition of Ni to the MgH2/LaH3 composite resulted in the synthesis of LaH3/MgH2/Ni composites. The LaH3/MgH2/Ni composites exhibited a higher hydrolysis rate120 mL/(gmin) of H-2 in the first 5 minthan the MgH2/LaH3 composite95 mL/(gmin)without the formation of the magnesium hydroxide passivation layer. Moreover, the yield rate was controlled by manipulation of the particle size via ball milling. The hydrolysis of MgH2 was also improved by optimizing the solution. The MgH2 produced 1711.2 mL/g of H-2 in 10 min at 298 K in the 27.1% ammonium chloride solution, and the hydrolytic conversion rate reached the value of 99.5%.
关键词
作者关键词:MgH2-based hydride; hydrolysis; hydrogen generation; composites
作者信息
通讯作者地址:Zhu, M (通讯作者)
 | S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China. |
地址:
电子邮件地址:meouyang@scut.edu.cn; miaolianma@163.com; h.minghong@mail.scut.edu.cn; meduanrm@gmail.con; mehwang@scut.edu.cn; lxsun@dicp.ac.cn; memzhu@scut.edu.cn
出版商
类别分类
研究方向:Energy & Fuels
Web of Science 类别:Energy & Fuels