Isothermal Dehydriding Kinetics of Mg₂NiH₄ Prepared under an External Magnetic Field

Abstract:

The Mg₂NiH₄ hydrogen storage metal hydride was prepared by hydriding combustion synthesis under an external magnetic field. The dehydriding kinetics of the hydrides was measured under isotherm condition. The kinetics mechanism of Mg₂NiH₄ materials was analyzed by model. The calculated results show that the theoretical calculation and the experimental data can reach a good agreement. The rate-controlling step is the diffusion of hydrogen atoms in the solid solution. The dehydriding activation energies of the sample synthesized under the optimized magnetic intensity of 6 T is 104 kJ/mol H₂.

• Periodical: Advanced Materials Research (Volumes 785-786)
• Pages: 638-641
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.785-786.638
• Online since: September 2013
• Authors: Jing Liu*
• Keywords: Hydrogen Desorption, Isothermal Kinetics, Magnetic Field, Model

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