Paper Title:
In-Situ TEM Observation for Dehydrogenation Mechanism in MgH2 with Catalyst
  Abstract

We carried out in-situ observation on the catalytic effect of Nb2O5 in MgH2 by using a high voltage transmission electron microscope (HVEM). We synthesized two kinds of samples, which were prepared by ball milling and by hand mixing. In milled sample, Nb2O5 was not confirmed from high resolution images, however, NbO was identified. As the temperature increased, the decomposition of MgH2 proceeded, while Mg formed and grew. It suggested that NbO had the catalytic effect to promote the dehydrogenation of MgH2. In mixed sample, which was prepared to clearly observe the boundary between the catalyst and Mg phase, it was revealed that the dehydrogenation started from the boundary of MgH2 and Nb2O5. This result suggested that the dehydrogenation could proceed with hydrogen diffusion from MgH2 through Mg phase to the boundary.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
2867-2870
DOI
10.4028/www.scientific.net/MSF.654-656.2867
Citation
E. Morita, A. Ono, S. Isobe, Y. M. Wang, N. Hashimoto, S. Ohnuki, "In-Situ TEM Observation for Dehydrogenation Mechanism in MgH2 with Catalyst", Materials Science Forum, Vols. 654-656, pp. 2867-2870, 2010
Online since
June 2010
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: Jin Man Jang, Won Sik Lee, Se Hyun Ko
Abstract:In present work, manufacturing technologies of titanium hydride powder were studied for recycling of titanium tuning chip and for this,...
185
Authors: Gil Jae Lee, Jae Hyeok Shim, Young Whan Cho, Kyung Sub Lee
Abstract:Fine Ti5Si3 powder has been synthesized from a mixture of elemental Ti and Si powders using a mechanochemical method. It shows a good...
951
Authors: Nobuhiko Takeichi, Hideaki Tanaka, Koji Tanaka, Nobuhiro Kuriyama, Tamotsu T. Ueda, Makoto Tsukahara, Hiroshi Miyamura, Shiomi Kikuchi
Abstract:Mg-based laminate composites prepared by a repetitive-rolling method have a large hydrogen capacity as well as good kinetics and...
1593
Authors: Aep Patah, Akito Takasaki, Janusz S. Szmyd
Abstract:The kinetics of hydrogen reaction (absorption and desorption) on the MgH2 have been reported to be improved significantly by addition of...
1605
Authors: Shi Xue Zhou, Hai Li Niu, Hai Peng Chen, Shuai Shuai Lu, Cai E Zhang, Li Ye Feng, Qian Qian Zhang
Abstract:Magnesium-based hydrogen storage powders were prepared by reactive milling under hydrogen atmosphere. The crystallitic carbon, prepared from...
69