Microstructure,surface properties and hydrating behaviour of Mg–C composites prepared by ball milling with benzene |
| |
Authors: | A Montone J Grbović A Bassetti L Mirenghi P Rotolo E Bonetti L Pasquini M Vittori Antisari |
| |
Affiliation: | 1. ENEA, Materials and Technology Unit. C.R. Casaccia, Via Anguillarese 301, 00060 Roma, Italy;2. p.a. INN Vin?a, Department of Material Sciences, P.O. Box 522, 11000 Belgrade, Serbia and Montenegro;3. Department of Physics, University of Bologna and CNISM, V.le Berti Pichat 6/2, 40127 Bologna, Italy;4. ENEA, Materials and Technology Unit. C.R. Brindisi, S.S. 7 Appia km 706, 72100 Brindisi, Italy |
| |
Abstract: | Mg–graphite composites, suitable for hydrogen storage, have been synthesized by ball milling metallic Mg with different amounts of graphite and benzene. The microstructure and the surface chemical composition have been characterized in order to explain the kinetics of reaction with hydrogen. The presence of benzene in the milled blends induces a finer powder particle size, helps to preserve the structural integrity of the graphite crystals and results to be necessary for a complete transformation of the milled powder to the hydride phase by thermal reaction with hydrogen gas. On the other hand, it induces a more pronounced reaction of the milled Mg–C composites with the air. The transport properties of the resulting surface contamination layer appear to control the kinetics of thermal decomposition of the MgH2 phase, so that the addition of benzene induces a higher reaction temperature owing to a larger thickness of the surface compound. |
| |
Keywords: | Hydrogen storage High-energy ball milling X-ray photoelectron spectroscopy Microstructure |
本文献已被 ScienceDirect 等数据库收录! |
|