Effect of titanium based complex catalyst and carbon nanotubes on hydrogen storage performance of magnesium

Kadri, Atikah and Jia, Yi and Chen, Zhigang and Yao, XiangDong (2013) Effect of titanium based complex catalyst and carbon nanotubes on hydrogen storage performance of magnesium. Science China Chemistry, 56 (4). pp. 451-458. ISSN 1674-7291

Abstract

Mg (MgH2)-based composites, using carbon nanotubes (CNTs) and pre-synthesized titanium based complex (TCat) as the catalysts, were prepared by high energy ball milling technique. The use of both catalysts demonstrated markedly improved the hydrogen storage performance, e.g. a significant increase of hydrogen release rate and decrease of desorption temperature. The synthesized composites can absorb almost 6 wt% of hydrogen within 3 min at 200 C and desorb 6 wt% hydrogen in 10 min at 310 C. The influence of CNTs and TCat on desorption temperature was also investigated by using temperature programmed desorption (TPD). The TPD results reveal that the peak desorption temperature and the onset temperature can be lowered by 109 C and 155 C, respectively, compared to the non-catalyzed MgH2. The reaction enthalpy and entropy of hydrogen desorption for the synthesized MgH2-based composites are calculated by the van't Hoff analysis to be 73.1 kJ/mol H2 and 130.2 J/mol H2 K, respectively.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 08 Jun 2017 05:47
Last Modified: 08 Jun 2017 05:47
Uncontrolled Keywords: carbon nanotubes; hydrogen storage; magnesium hydride; mechanical milling; titanium compound catalysts; desorption temperatures; high-energy ball milling; hydrogen desorption; magnesium hydride; Mechanical milling; Reaction enthalpies; Storage performance; Van't Hoff Analysis; chemical products generalls; chemical operations; nanotechnology; materials Science; titanium and alloys; metallurgy and metallography; gas fuels; magnesium and alloys
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
02 Physical Sciences > 0299 Other Physical Sciences > 029999 Physical Sciences not elsewhere classified
03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030302 Nanochemistry and Supramolecular Chemistry
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1007/s11426-013-4856-2
URI: http://eprints.usq.edu.au/id/eprint/31713

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