Facile Synthesis of Nanosized Sodium Magnesium Hydride, NaMgH3

Hazel Reardon, Natalia Mazur, Duncan H. Gregory

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The ternary magnesium hydride, NaMgH3 has been synthesised via reactive milling techniques. The method employed neither a reactive H2 atmosphere, nor high pressure sintering or other post-treatment processes. The formation of the ternary hydride was studied as a function of milling time and ball:powder ratio. High purity NaMgH3 powder (Orthorhombic space group Pnma, a=5.437(2) Å b=7.705(5) Å c=5.477(2) Å; Z=4) was prepared in 5 h at high ball:powder ratios and characterised by Powder X-ray diffraction (PXD), Raman spectroscopy and Scanning Electron Microscopy/Energy Dispersive X-ray Spectroscopy (SEM/EDX). The products formed sub-micron scale (typically 200–400 nm in size) crystallites that were approximately isotropic in shape. The dehydrogenation behaviour of the ternary hydride was investigated by temperature programmed desorption (TPD). The nanostructured hydride releases hydrogen in two steps with an onset temperature for the first step of 513 K.

Original languageEnglish
Pages (from-to)343-350
Number of pages8
JournalProgress in Natural Science: Materials International
Volume23
Issue number3
DOIs
Publication statusPublished - Jun 2013

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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