Influence of oxygen on the absorption performance of MgH2 hydrogen-storage materials
Mg-based hydrogen-storage materials are regarded aspromising hydrogen-storage alloys.However,in practical applications,Mg-based hydrogen-storage materials may be exposed to the air or alow-purity-gas environment with particularly oxygen as impurity.In this paper,the influence of a micro-amount of oxygen on the performance of absorption of MgH2 hydrogen storage materialhas beenstudied by placing samples in an argon-filled glove box(at atmospheric pressure)with 1000 ppm oxygen concentration.The hydrogen capacity and absorption kinetics were measuredbyusing ahigh-pressure and high-temperature gas-adsorption analyzer.The activation energy for hydrogenation has been determined by means of the Arrhenius equation.It isfound that theabsorption of MgH2improves significantlyby amicro-amount of oxygen,especially at high temperature.
Mg-based hydrogen storage materials Magnesium hydride Oxygen influence Reaction kinetics
En Xu Qi Wang Zhigang Zhao
State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemistry and Chemical Engineering,Nanjing Tech University,Nanjing,China
国内会议
上海
英文
1-6
2016-11-04（万方平台首次上网日期，不代表论文的发表时间）