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A Homogeneous Metal Oxide Catalyst Enhanced Solid–Solid Reaction in the Hydrogen Desorption of a Lithium–Hydrogen–Nitrogen System

Authors

  • Tengfei Zhang,

    Corresponding author
    1. Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo 060-0808 (Japan), Fax: (+81) 11-706-6772
    • Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo 060-0808 (Japan), Fax: (+81) 11-706-6772

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  • Dr. Shigehito Isobe,

    Corresponding author
    1. Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo 060-0808 (Japan), Fax: (+81) 11-706-6772
    2. Creative Research Institution, Hokkaido University, N-21, W-10, Sapporo, 001-0021 (Japan)
    • Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo 060-0808 (Japan), Fax: (+81) 11-706-6772

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  • Dr. Yongming Wang,

    1. Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo 060-0808 (Japan), Fax: (+81) 11-706-6772
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  • Prof. Naoyuki Hashimoto,

    1. Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo 060-0808 (Japan), Fax: (+81) 11-706-6772
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  • Prof. Somei Ohnuki

    1. Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo 060-0808 (Japan), Fax: (+81) 11-706-6772
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Abstract

In this study, LiTi2O4 was synthesized as a possible catalyst in the Li-N-H system. The properties of hydrogen desorption in the Li-N-H system with a homogeneous catalyst have been investigated. The X-ray diffraction and X-ray photoelectron spectroscopy results indicated that the single phase of LiTi2O4 was successfully synthesized and it was stable in the sample after high energy ball-milling and heat treatment. LiTi2O4 exhibited a catalytic effect in the Li-N-H system according to the thermogravimetry differential thermal analysis results. During dehydrogenation, a storage capacity of 5.7 wt % was obtained under moderate temperature. A sharp peak of thermal gas desorption mass spectrometry curve occurred at 227 °C. Furthermore, the catalytic mechanism of LiTi2O4 in the Li-N-H system was discussed in accordance with the experimental results.

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