Effect of Nb2O5 and SWCNT on the H2 sorption properties of Mg-based hydrogen storage system

Yu Siang Chuang, Sheng-Jye Hwang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Metal hydrides are of considerable interest for safe and practical hydrogen storage. Among theses, Mg is regarded as a promising hydrogen storage material due to its high theoretical gravimetric, volumetric capacity and the full reversibility of its sorption reactions combined with low cost, low density and environmental friendliness. In previous studies, the superior catalytic effect of Nb2O5 was demonstrated and compared to other metal oxide catalysts. However, the nanocrystalline MgH2-Nb2O5 mixtures must be milled for more than 20 hours to obtain the outstanding sorption kinetics. Long milling time causes high production costs, and makes the system less attractive for commercial applications. In this way, ternary mixtures Mg-Nb2O5-SWCNT (molar ratio %=97.5:0.5:2.0) were prepared by high-energy ball milling and their hydrogen storage behaviors were investigated. The structural and phase evolution of SWCNT and Nb2O5 were investigated by using X-ray diffractometry (XRD) and morphology by scanning electron microscopy (SEM). Detail sorption mechanisms were discussed to understand the catalytic effect.

Original languageEnglish
Pages (from-to)327-332
Number of pages6
JournalJournal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
Issue number4
Publication statusPublished - 2014 Aug 1

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering


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