Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (04): 781.doi: 10.3969/j.issn.0251-0790.2012.04.024

• Physical Chemistry • Previous Articles     Next Articles

Synergistic Catalysis of Fe2O3 and TiF3 Additives on the LiBH4-MgH2 Composite

ZHANG Hui1,2, ZHOU Yi-Xi1,2, SUN Li-Xian2, CAO Zhong1, XU Fen3, LIU Shu-Sheng2, ZHANG Jian2, SONG Li-Fang2, SI Xiao-Liang2, JIAO Cheng-Li2, WANG Shuang2, LI Zhi-Bao2, LIU Shuang2, LI Fen2   

  1. 1. School of Chemistry & Biological Engineering, Changsha University of Science and Technology, Changsha 410004, China;
    2. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
    3. Chemistry and Chemical Engineering School, Liaoning Normal University, Dalian 116029, China
  • Received:2011-09-14 Online:2012-04-10 Published:2012-04-10
  • Supported by:

    国家"九七三"计划项目(批准号: 2010CB631303)、国家自然科学基金(批准号: 20833009, 51071146, 21173111, 20903095, 51071081, 51101145, U0734005, 51102230)和广东省-中国科学院联合基金(批准号: 2010A090100034)资助.

Abstract: Five systems(2LiBH4-MgH2, 2LiBH4-MgH2-10%Fe2O3, 2LiBH4-MgH2-10%TiF3, 2LiBH4-MgH2-5%Fe2O3-5%TiF3 and 2LiBH4-MgH2-10%Fe2O3-10%TiF3) were prepared by ball milling. They were investigated through thermogravimeteric analysis(TG), diffraction scanning calorimetric(DSC), powder X-ray diffraction(XRD), Fourier transformed infrared spectrometer(FTIR) and pressure-content-temperature(PCT). The addition of Fe2O3 and TiF3 improved the hydrogen release property of the LiBH4-MgH2 complex system effectively. Especially, the codoped system(2LiBH4-MgH2-10%Fe2O3-10%TiF3) starts to release hydrogen at around 110 ℃ and can release as much as 9.6%. Besides, the results of PCT show that the codoped system(2LiBH4-MgH2-5%Fe2O3-5%TiF3) can release about 8.6% hydrogen within 10 min at 400 ℃. The properties of the codoped system are better than the other two single doped systems, which partly incarnated the synergistic catalysis of Fe2O3 and TiF3.

Key words: LiBH4, MgH2, Fe2O3, TiF3, Synergistic catalysis

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