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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.3 P.208-212

http://doi.org/10.1631/jzus.2005.B0208


Hydrogenation properties of mechanically milled Mg2Ni0.8Cr0.2-CoO/Al2O3 composites


Author(s):  WANG Xiu-li, TU Jiang-ping, CHEN Chang-pin, ZHANG Xiao-bin, ZHAO Xin-bing

Affiliation(s):  Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   tujp@zju.edu.cn

Key Words:  Mg2Ni-based composite, Hydrogen storage, Ball milling, Catalyst, Hydriding/dehydriding kinetics


WANG Xiu-li, TU Jiang-ping, CHEN Chang-pin, ZHANG Xiao-bin, ZHAO Xin-bing. Hydrogenation properties of mechanically milled Mg2Ni0.8Cr0.2-CoO/Al2O3 composites[J]. Journal of Zhejiang University Science B, 2005, 6(3): 208-212.

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author="WANG Xiu-li, TU Jiang-ping, CHEN Chang-pin, ZHANG Xiao-bin, ZHAO Xin-bing",
journal="Journal of Zhejiang University Science B",
volume="6",
number="3",
pages="208-212",
year="2005",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2005.B0208"
}

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%T Hydrogenation properties of mechanically milled Mg2Ni0.8Cr0.2-CoO/Al2O3 composites
%A WANG Xiu-li
%A TU Jiang-ping
%A CHEN Chang-pin
%A ZHANG Xiao-bin
%A ZHAO Xin-bing
%J Journal of Zhejiang University SCIENCE B
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%N 3
%P 208-212
%@ 1673-1581
%D 2005
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2005.B0208

TY - JOUR
T1 - Hydrogenation properties of mechanically milled Mg2Ni0.8Cr0.2-CoO/Al2O3 composites
A1 - WANG Xiu-li
A1 - TU Jiang-ping
A1 - CHEN Chang-pin
A1 - ZHANG Xiao-bin
A1 - ZHAO Xin-bing
J0 - Journal of Zhejiang University Science B
VL - 6
IS - 3
SP - 208
EP - 212
%@ 1673-1581
Y1 - 2005
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2005.B0208


Abstract: 
Mg2Ni0.8Cr0.2-x wt.% CoO/Al2O3 (x=0.5, 1, 2 and 3) composites were prepared by mechanically milling sintered Mg2Ni0.8Cr0.2 alloy and CoO/Al2O3 compound for 45 h. The addition of CoO/Al2O3 compound resulted in the good kinetics properties of hydriding/dehydriding reaction of the composites. The composite with 1.0 wt.% CoO/Al2O3 catalyst could reach the maximum hydrogen absorption capacity (2.9 wt.%) within 5 min at 393 K under H2 pressure of 4 MPa, and can desorb rapidly at 493 K. The decomposition and synthesis of hydrogen molecule on Mg2Ni0.8Cr0.2 alloy surface was promoted by addition of CoO/Al2O3 catalyst. In addition, the formation of metallic Ni particles, strain and defects during the ball milling process also resulted in the improved hydrogenation performance of Mg2Ni-based alloys.

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Reference

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