Paper Title:
Synergetic Effect of Oxides on Hydrogen Reaction Kinetics of Magnesium Hydride
  Abstract

The kinetics of hydrogen reaction (absorption and desorption) on the MgH2 have been reported to be improved significantly by addition of transition metal oxides as catalysts. Among the oxides reported previously, Cr2O3 seems to improve hydrogen absorption kinetics and Nb2O5 for desorption kinetics. The catalytic effect of addition of more than one oxide, however, has not been reported yet. We investigated the hydrogen reaction kinetics of ball milled MgH2 powders added with either Cr2O3 or ZnO together with Nb2O5. In absorption reaction, the hydrogen contents reached 6 wt% and 5.3 wt% in 5 min for the powders added with 1 mol% ZnO + 1 mol% Nb2O5 and with 1 mol% Cr2O3 + 1 mol% Nb2O5, respectively. Those powders desorbed hydrogen up to about 4.5 wt% in 20 min. The significant improvement was not expected if one of the oxides was added separately. The combination of two kinds of oxides might play an important role for improvement of reaction kinetics.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
1605-1608
DOI
10.4028/www.scientific.net/MSF.561-565.1605
Citation
A. Patah, A. Takasaki, J. S. Szmyd, "Synergetic Effect of Oxides on Hydrogen Reaction Kinetics of Magnesium Hydride", Materials Science Forum, Vols. 561-565, pp. 1605-1608, 2007
Online since
October 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yang Huan Zhang, Xiao Gang Liu, Le Le Chen, Hui Ping Ren, Guo Fang Zhang, Dong Liang Zhao
Chapter 8: Energy Materials
Abstract:The nanocrystalline and amorphous Mg2Ni-type Mg20Ni10-xMnx (x = 0, 1, 2, 3, 4) alloys were synthesized by melt-spinning technique. The...
3420
Authors: Ayyavu Venkateswari, S. Kumaran, C. Nithya
Abstract:Nanostructured Mg2Ni intermetallic compounds were synthesised by high energy ball milling. Effect of milling time on structure and...
137