Issue 18, 2013
From the journal:

RSC Advances

A solid–solid reaction enhanced by an inhomogeneous catalyst in the (de)hydrogenation of a lithium–hydrogen–nitrogen system

Tengfei Zhang,*a   Shigehito Isobe,ab   Yongming Wang,a   Naoyuki Hashimotoa  and  Somei Ohnukia  

* Corresponding authors

a Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo 060-0808, Japan
E-mail: zhangtengfei@eng.hokudai.ac.jp
Fax: 81 11706 6772
Tel: 81 11706 6772

b Creative Research Institution, Hokkaido University, N-21, W-10, Sapporo, Japan

Abstract

The reaction mechanism of the (de)hydrogenation of a LiNH2 + LiH mixture with a nanoscale catalyst has been investigated. In this research, the position of each solid phase was examined by transmission electron microscopy (TEM). The observation showed that LiH particles, around 100 nm in size, formed around LiNH2 in the hydrogenation process. According to in situ TEM observation of the dehydrogenation process, the LiH particles became smaller as they reacted with LiNH2. Fine particles of Li2NH with crystallites of size 30–40 nm formed on the surface of the LiNH2. It indicated that H+ from the LiNH2 moved to the interface and combined with H− from the LiH in the dehydrogenation process, consequently H2 was released. At the same time, Li+ ions diffused from the LiH to the LiNH2 through the interface and Li2NH formed. On the other hand, it was confirmed that the catalyst was located at the interface between the LiH and LiNH2. It was found that the catalyst had the effect of improving the migration of Li+ from LiH to LiNH2.

Graphical abstract: A solid–solid reaction enhanced by an inhomogeneous catalyst in the (de)hydrogenation of a lithium–hydrogen–nitrogen system

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Article information

DOI
https://doi.org/10.1039/C3RA40379C
Article type
Communication
Submitted
23 Jan 2013
Accepted
08 Mar 2013
First published
08 Mar 2013

RSC Adv., 2013,3, 6311-6314

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A solid–solid reaction enhanced by an inhomogeneous catalyst in the (de)hydrogenation of a lithium–hydrogen–nitrogen system

T. Zhang, S. Isobe, Y. Wang, N. Hashimoto and S. Ohnuki, RSC Adv., 2013, 3, 6311 DOI: 10.1039/C3RA40379C

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