| Title | On the nucleation step in the Mg-MgH2 phase transformation |
|---|---|
| Publication Type | Articolo su Rivista peer-reviewed |
| Year of Publication | 2009 |
| Authors | M. Antisari, Vittori, Aurora A., Mirabile Gattia Daniele, and Montone Amelia |
| Journal | Scripta Materialia |
| Volume | 61 |
| Pagination | 1064-1067 |
| ISSN | 13596462 |
| Keywords | Catalysts, Crystal defects, Desorption, Fast nucleation, Free surfaces, Hydrogen, Hydrogen absorption, Hydrogen storage, Kinetic analysis, Magnesium, Metal catalyst, Nanocomposites, Nucleation, Nucleation sites, Phase transformation, Phase transformation kinetics, Physical mechanism, Reverse reactions, Scanning, Scanning electron microscopy, Surface defects |
| Abstract | Scanning electron microscopy was used to support kinetic analysis in order to ascertain the physical mechanisms involved in the Mg-MgH2 phase transformation. Kinetic asymmetry in hydrogen absorption and desorption was explained by the different requirements for fast nucleation in the two reactions. In particular, MgH2 nucleation in Mg is assisted by crystal defects, while free surface is the only nucleation site in the reverse reaction. This explains, for the first time, the different role of the metal catalyst in the two reactions. © 2009 Acta Materialia Inc. |
| Notes | cited By 27 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-70349454061&doi=10.1016%2fj.scriptamat.2009.08.030&partnerID=40&md5=6fcdfba96879d56b6efbc32ad4c24102 |
| DOI | 10.1016/j.scriptamat.2009.08.030 |
| Citation Key | VittoriAntisari20091064 |
