期刊
SCRIPTA MATERIALIA
卷 54, 期 7, 页码 1293-1297出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2005.12.011
关键词
hydrogen storage; kinetics; nanocrystalline; magnesium hydride; Nb2O5
The influence of Nb2O5 nanoparticles (15 nm) as an additive for mechanical milling on the hydrogen sorption kinetics of MgH2 was investigated. By using nanometric Nb2O5, a significant reduction of milling time (200 times shorter) with a decrease of desorption temperature by 60 degrees C were observed in comparison to its micrometric form. X-ray diffraction and hydrogen sorption measurements led to the proposal of two possible mechanisms for the hydrogen sorption based on an intimate contact between MgH2 and Nb2O5. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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