高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (04): 781.doi: 10.3969/j.issn.0251-0790.2012.04.024

• 物理化学 • 上一篇    下一篇

Fe2O3 与TiF3 添加剂对LiBH4-MgH2 复合氢化物体系的协同催化作用

张慧1,2, 周奕汐1,2, 孙立贤2, 曹忠1, 徐芬3, 刘淑生2, 张箭2, 宋莉芳2, 司晓亮2, 焦成丽2, 王爽2, 李志宝2, 刘双2, 李芬2   

  1. 1. 长沙理工大学化学与生物工程学院, 长沙 410004;
    2. 中国科学院大连化学物理研究所, 大连116023;
    3. 辽宁师范大学化学化工学院, 大连 116029
  • 收稿日期:2011-09-14 出版日期:2012-04-10 发布日期:2012-04-10
  • 作者简介:孙立贤, 男, 博士, 研究员, 博士生导师, 主要从事热化学和储氢研究. E-mail: lxsun@dicp.ac.cn;曹忠, 男, 博士, 教授, 主要从事生物纳米传感和能源材料研究. E-mail: zhongcao04@yahoo.com.cn
  • 基金资助:

    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.

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.

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摘要： 通过球磨方法制备出2LiBH4-MgH2, 2LiBH4-MgH2-10%Fe2O3, 2LiBH4-MgH2-10%TiF3, 2LiBH4-MgH2-5%Fe2O3-5%TiF3和2LiBH4-MgH2-10%Fe2O3-10%TiF3 5个复合氢化物体系, 用热重(TG)、差示扫描量热(DSC)、X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)和压力-组成-温度仪(PCT)等对所制备体系进行表征. 结果表明, Fe2O3和TiF3的掺杂均能够有效地改善2LiBH4-MgH2复合体系的放氢性能, 尤其是两者共掺杂的2LiBH4-MgH2-10%Fe2O3-10%TiF3体系, 初始放氢温度为110 ℃, 总放氢量达到约9.6%. 对2LiBH4-MgH2-5%Fe2O3-5%TiF3体系的PCT表征结果表明, 在 400 ℃时, 10 min内放氢量达到了8.6%, 放氢热力学和放氢动力学均优于单一相的掺杂, 体现了两相掺杂的协同催化作用.

关键词: LiBH4, MgH2, Fe2O3, TiF3, 协同催化

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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