Gaseous hydrogen storage properties of Mg-Y-Ni-Cu alloys prepared by melt spinning期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Gaseous hydrogen storage properties of Mg-Y-Ni-Cu alloys prepared by melt spinning

Authors:	Yanghuan Zhang Yaqin Li Wei Zhang Zeming Yuan Zhonghui Hou Yan Qi Shihai Guo

Affiliation:	1. Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;2. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China;3. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China

Abstract:	For purpose of promoting the hydrogen absorption and desorption thermodynamics and kinetics properties of Mg $/>Ni-based alloys, partially substituting Y and Cu for Mg and Ni respectively and melt spinning technique were applied for getting Mg<sub>25–<em>x</em></sub>Y<sub><em>x</em></sub>Ni<sub>9</sub>Cu (<em>x</em> = 0–7) alloys. Their microstructures and phases were characterized with the help of X-ray diffraction and transmission electron microscopy. Their hydrogen absorbing and desorbing properties were tested by a Sievert apparatus, DSC, and TGA, which were connected with a H<sub>2</sub> detector. In order to estimate the dehydrogenation activation energy of alloy hydride, both Arrhenius and Kissinger methods were applied for calculation. It is found that their hydriding kinetics notably declines, however, their hydrogen desorption kinetics conspicuously improves, with spinning rate and Y content increasing. Their hydrogen desorption activation energy markedly decreases under the same constraint, and it is found that melt spinning and Y substituting Mg improve the real driving force for dehydrogenation. As for the tendency of hydrogen absorption capacity, it presents an elevation firstly and soon after a decline with the rising of spinning rate, however, it always lowers with Y content growing. With Y content and spinning rate increasing, their thermodynamic parameters (Δ<em>H</em> and Δ<em>S</em> absolute values) visibly decrease, and the starting hydrogen desorption temperatures of alloy hydrides obviously lower.</td> </tr> <tr> <td align=$
Keywords:	Corresponding author. Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China. Mg-Ni-based alloy Melt spinning Activation energy Hydrogen storage kinetics Thermodynamics Rare earths
本文献已被 CNKI ScienceDirect 等数据库收录！

设为首页 | 免责声明 | 关于勤云 | 加入收藏