| Title | Metal-hydride transformation kinetics in Mg nanoparticles |
|---|---|
| Publication Type | Articolo su Rivista peer-reviewed |
| Year of Publication | 2009 |
| Authors | Pasquini, L., Callini E., Piscopiello E., Montone Amelia, Antisari M.V., and Bonetti E. |
| Journal | Applied Physics Letters |
| Volume | 94 |
| ISSN | 00036951 |
| Keywords | Constant rates, Fourier transforms, Growth (materials), Hydride formations, Hydride transformations, Hydrogen, Hydrogen cycling, Hydrogen sorptions, Inert gas condensations, Inert gases, Magnesium, Magnesium oxides, Magnesium printing plates, Nanoparticles, One-dimensional growths, Particle surfaces, Reverse transformations, Sorption, Three dimensional, Three-dimensional growths, Transmission electrons, Volumetric apparatus |
| Abstract | The hydrogen sorption kinetics of magnesium nanoparticles prepared by inert gas condensation and coated by a magnesium oxide layer were investigated by a volumetric apparatus. The metal-hydride transformation was studied by transmission electron microscopy of the nanoparticles both in the as-prepared state and after hydrogen cycling. In small nanoparticles (≈35 nm) hydride formation proceeds by one-dimensional growth controlled by diffusion through the hydride, while the reverse transformation to metal involves interface-controlled three-dimensional growth of nuclei formed at constant rate. Large nanoparticles (≈450 nm) exhibit very low reactivity attributed to reduced probability of hydrogen dissociation/recombination and nucleation at the particle surface. © 2009 American Institute of Physics. |
| Notes | cited By 25 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-59349092787&doi=10.1063%2f1.3077186&partnerID=40&md5=9b8d0c4fdf4a368cdb2436f8cf108348 |
| DOI | 10.1063/1.3077186 |
| Citation Key | Pasquini2009 |
