TY - JOUR
T1 - Facile Synthesis of Nanosized Sodium Magnesium Hydride, NaMgH3
AU - Reardon, Hazel
AU - Mazur, Natalia
AU - Gregory, Duncan H.
N1 - Funding Information:
DHG thanks the EPSRC for funding under Grants EP/E040071/1 and EP/I022570/1 , the EPSRC, the Materials KTN and EADS Innovation Works for a CASE studentship for HR and the British Council for funding the placement of NM under the UK IAESTE Scheme.
Publisher Copyright:
© 2013 Chinese Materials Research Society
PY - 2013/6
Y1 - 2013/6
N2 - 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.
AB - 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.
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U2 - 10.1016/j.pnsc.2013.05.003
DO - 10.1016/j.pnsc.2013.05.003
M3 - Article
AN - SCOPUS:84878248907
SN - 1002-0071
VL - 23
SP - 343
EP - 350
JO - Progress in Natural Science: Materials International
JF - Progress in Natural Science: Materials International
IS - 3
ER -