Catalytically enhanced hydrogen sorption in Mg-MgH2 by coupling vanadium-based catalyst and carbon nanotubes

Kadri, Atikah, Jia, Yi, Chen, Zhigang and Yao, Xiangdong (2015) Catalytically enhanced hydrogen sorption in Mg-MgH2 by coupling vanadium-based catalyst and carbon nanotubes. Materials, 8 6: 3491-3507. doi:10.3390/ma8063491


Author Kadri, Atikah
Jia, Yi
Chen, Zhigang
Yao, Xiangdong
Title Catalytically enhanced hydrogen sorption in Mg-MgH2 by coupling vanadium-based catalyst and carbon nanotubes
Formatted title
Catalytically enhanced hydrogen sorption in Mg-MgH2 by coupling vanadium-based catalyst and carbon nanotubes
Journal name Materials   Check publisher's open access policy
ISSN 1996-1944
Publication date 2015-06-12
Sub-type Article (original research)
DOI 10.3390/ma8063491
Open Access Status DOI
Volume 8
Issue 6
Start page 3491
End page 3507
Total pages 17
Place of publication Basel, Switzerland
Publisher MDPI AG
Collection year 2016
Language eng
Formatted abstract
Mg (MgH2)-based composites, using carbon nanotubes (CNTs) and pre-synthesized vanadium-based complex (VCat) as the catalysts, were prepared by high-energy ball milling technique. The synergistic effect of coupling CNTs and VCat in MgH2 was observed for an ultra-fast absorption rate of 6.50 wt. % of hydrogen per minute and 6.50 wt. % of hydrogen release in 10 min at 200 °C and 300 °C, respectively. The temperature programmed desorption (TPD) results reveal that coupling VCat and CNTs reduces both peak and onset temperatures by more than 60 °C and 114 °C, respectively. In addition, the presence of both VCat and CNTs reduces the enthalpy and entropy of desorption of about 7 kJ/mol H2 and 11 J/mol H2·K, respectively, as compared to those of the commercial MgH2, which ascribe to the decrease of desorption temperature. From the study of the effect of CNTs milling time, it is shown that partially destroyed CNTs (shorter milling time) are better to enhance the hydrogen sorption performance.
Keyword Carbon nanotubes
Hydrogen storage
Magnesium hydride
Vanadium complex catalyst
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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