Catalytic effects of V and V2O5 on hydrogen storage property of Mg17Al12 alloy |
| |
| Authors: | Huajian Wu Jiaqi Du Fangfang Cai Fan Xu Wenlou Wei Jin Guo Zhiqiang Lan |
| |
| Affiliation: | 1. Guangxi Key Laboratory for Relativistic Astrophysics, Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology, Guangxi Novel Battery Materials Research Center of Engineering Technology, Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, School of Physical Science and Technology, Guangxi University, Nanning, 530004, PR China;2. Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China |
| |
| Abstract: | A Mg17Al12 alloy was synthesized via sintering, and the catalytic effects of V and V2O5 on the hydrogen (H2)-storage properties of this alloy were investigated. The results revealed that the hydrogenation/dehydrogenation temperature of Mg17Al12 decreased markedly and the reversible hydrogen storage properties improved with the addition of V or V2O5. For example, at 250 °C, the Mg17Al12 alloy underwent hydrogenation only and a hydrogen absorption capacity of 2.22 wt.% was realized. However, with the addition of V and V2O5, (i) reversible hydrogen absorption/desorption occurred, (ii) the hydrogen absorption capacity increased to 2.95 wt.% and 3.35 wt.%, and (iii) the hydrogenation/dehydrogenation enthalpy of the Mg17Al12alloy decreased from 65.7/83.1 kJ·mol?1 to 62.6/69.3 kJ·mol?1 and 59.9/68.1 kJ·mol?1, respectively. |
| |
| Keywords: | Hydrogen-storage property Catalytic effect |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
