Hydrogen storage properties of MgH2 mechanically milled with α and β SiC

✍ Scribed by Sandra Kurko; Željka Rašković; Nikola Novaković; Bojana Paskaš Mamula; Zoran Jovanović; Zvezdana Baščarević; Jasmina Grbović Novaković; Ljiljana Matović

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 855 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.07.022

✦ Synopsis

To understand the influence of various crystallographic phases on hydrogen storage properties, ball milling of MgH 2 with hexagonal (a) and cubic (b) SiC have been performed.

Structural characterization of all samples has been done by X-ray diffraction (XRD) analysis, particle size analysis and scanning electron microscopy (SEM). Investigation of hydrogen desorption properties of prepared nanocomposites has been done using temperature programmed desorption (TPD) technique. Despite the results of structural and morphological characterization of obtained nanocomposites are very similar, TPD spectra show significant differences regarding existence of intermediate temperature peak. In the sample milled with hexagonal SiC this peak originates both from H 2 and H 2 O, while in the sample milled with cubic phase it only comes from H 2 O. Both samples exhibit low temperature H 2 peak at 385 K.