4.5 Article

Nanostructured bulk Mg plus MgO composite synthesized through arc plasma evaporation and high pressure torsion for H-storage application

出版社

ELSEVIER
DOI: 10.1016/j.mseb.2013.11.025

关键词

Hydrogen storage; High pressure torsion (HPT); Nanostructured materials; Magnesium

资金

  1. Science and Technology Committee of Shanghai [10JC1407700, 11ZR1417600, 11PJ1406000]
  2. Doctoral Program of Higher Education of China [20100073120007]
  3. Shanghai education commission [12ZZ017]

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A nanostructured Mg based bulk material containing Mg nano-grains and dispersed nanosized MgO was prepared through arc plasma method followed by high pressure torsion (HPT). In comparison to pure Mg ultrafine powders prepared using only arc plasma method, the hydrogenation enthalpy was slightly increased and the absorption activation energy was reduced through the HPT treatment. The structure refinement and the fragmentation of the MgO layer induced by the HPT account for the improved hydrogen sorption thermodynamic and kinetic properties. (C) 2014 Elsevier B.V. All rights reserved.

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