Effect of NbF5 on the hydrogen desorption property of Mg-Ni composite prepared by hydriding combustion synthesis and mechanical milling

  • Master Student Hao Cai, College of Materials Science and Engineering, Nanjing University of Technology, China
  • Doctor Student Hao Gu, College of Materials Science and Engineering, Nanjing University of Technology, China
  • Associate Professor Yunfeng Zhu, College of Materials Science and Engineering, Nanjing University of Technology, China
  • Liquan Li, College of Materials Science and Engineering, Nanjing University of Technology, China

    • The effect of NbF5 as the catalyst on the hydrogen desorption property of Mg-Ni composite was investigated. Mg95Ni5 composite was prepared by hydriding combustion synthesis (HCS) and subsequent mechanical milling (MM) for 5 hours with 0.5mol% NbF5 as catalyst. The structural characterizations were examined by X-ray diffraction (XRD) and scanning electron microscope (SEM). The hydrogen desorption temperature was analyzed by differential scanning calorimetry (DSC). The results showed a significant effect of NbF5 on the dehydrogenation kinetics as well as the reduction of initial hydrogen desorption temperature of Mg95Ni5 composite. The decreased activated energy for hydrogen desorption was also estimated from the Kissinger Plot.