Improvement in hydrogen cycling properties of magnesium through added graphite

Authors

Zhenguo Huang, University of WollongongFollow
Zaiping Guo, University of WollongongFollow
Andrzej Calka, University of WollongongFollow
David Wexler, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow

RIS ID

17173

Publication Details

Huang, Z., Guo, Z., Calka, A., Wexler, D. & Liu, H. K. (2007). Improvement in hydrogen cycling properties of magnesium through added graphite. Materials Letters, 61 (14-15), 3163-3166.

Abstract

Magnesium was milled under hydrogen with three types of carbon allotropes: carbon black, graphite, and multi-walled carbon nanotubes, respectively, using a special low-energy shearing mill. Structural and phase evolution were investigated using X-ray diffractometry (XRD) and morphology was investigated by scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS). Raman spectroscopy was used to investigate the changes in the nature of carboncarbon bonding and differential scanning calorimetry (DSC) to investigate desorption characteristics. A Sieverts-type apparatus was applied to characterize the hydrogen absorption and desorption properties. It was found that graphite not only improved the hydrogen absorption, but also the desorption kinetics.