Abstract
The effects of different carbon additives: carbon black, graphite and multi-walled carbon nanotubes, on the hydrogen storage properties of magnesium were investigated and compared. Samples of Mg containing 5 wt.% additive were prepared by milling in hydrogen gas using a magnetically controlled ball mill. Structural and phase evolution were investigated using X-ray diffractometry (XRD) and morphology and microchemistry by scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS). Raman spectroscopy was used to investigate changes in the nature of carbon-carbon bonding, differential scanning calorimetry (DSC) to investigate desorption characteristics, and thermogravimetry (TG) to estimate the hydrogen storage capacity of both milled and rehydrogenated samples. There was no significant difference in the hydrogen storage capacity between the as-prepared (6.4 wt.%) and rehydrogenated (6.2 wt.%) composites, however, the rehydrogenated composite containing graphite displayed a remarkable decrease in the desorption temperature, a result which wants further investigation. © 2006 Elsevier B.V. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 94-100 |
| Journal | Journal of Alloys and Compounds |
| Volume | 427 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 16 Jan 2007 |
| Externally published | Yes |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.Funding
Financial support from the Australian Research Council through an ARC Discovery project (DP 0449660) is gratefully acknowledged.
Research Keywords
- Hydrogen storage materials
- Mechanical alloying
