高等学校化学学报

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (4): 796.

• 研究论文 • 上一篇    下一篇

TiF3对LiAlH4放氢性能的影响

刘淑生1,2, 孙立贤1, 宋莉芳1,2, 姜春红1,2, 张箭1, 张耀1, 徐芬3, 张志恒4   

  1. 1. 中国科学院大连化学物理研究所, 大连 116023;
    2. 中国科学院研究生院, 北京 100049;
    3. 辽宁师范大学化学化工学院, 大连 116029;
    4. 中国石油管道研究中心, 廊坊 065000
  • 收稿日期:2009-06-15 出版日期:2010-04-10 发布日期:2010-04-10
  • 通讯作者: 孙立贤, 男, 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; 徐芬, 女, 教授, 主要从事热化学和制氢研究. E-mail: xufen@lnnu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20833009, 20873148, 50671098 和U0734005)、国家“八六三”计划项目(批准号: 2007AA05Z115, 2007AA05Z102)、国家“九七三”计划项目(批准号: 2010CB631303)和国际纯粹应应用化学联合会项目(批准号: 2008-006-3-100)资助.

Effect of TiF3 on the Dehydrogenation of LiAlH4

LIU Shu-Sheng1,2, SUN Li-Xian1*, SONG Li-Fang1,2, JIANG Chun-Hong1,2, ZHANG Jian1, ZHANG Yao1, XU Fen3*, ZHANG Zhi-Heng4   

  1. 1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China;
    3. Chemistry and Chemical Engineering School, Liaoning Normal University, Dalian 116029, China;
    4. PetroChina Pipeline R & D Center, Langfang 065000, China
  • Received:2009-06-15 Online:2010-04-10 Published:2010-04-10
  • Contact: SUN Li-Xian. E-mail: lxsun@dicp.ac.cn; XU Fen. E-mail: xufen@lnnu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20833009, 20873148, 50671098 和U0734005)、国家“八六三”计划项目(批准号: 2007AA05Z115, 2007AA05Z102)、国家“九七三”计划项目(批准号: 2010CB631303)和国际纯粹应应用化学联合会项目(批准号: 2008-006-3-100)资助.

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摘要：

采用X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)和热重(TG)等测试方法, 对掺杂TiF3前后和不同TiF3掺杂量LiAlH4的放氢性能进行了研究. 结果发现, 在TiF3存在下, LiAlH4在球磨过程中有少量分解. TiF3对LiAlH4放氢具有明显的催化作用. 随着掺杂量的增加, LiAlH4的起始放氢温度降低, 但放氢量会明显减少. 掺杂2%(摩尔分数)TiF3的LiAlH4从80 ℃开始放氢, 比未处理的LiAlH4的起始放氢温度降低了70 ℃, 放氢量高达6.6%(质量分数).

关键词: 三氟化钛; 氢化铝锂; 放氢; 催化

Abstract:

The dehydrogenation performances of as-received, ball-milled and different amounts of TiF3 doped LiAlH4 were investigated by X-ray diffraction(XRD), Fourier transformed infrared spectrometer(FTIR) and thermogravimetry(TG) measurements. It was found that LiAlH4 decomposes a little during ball milling in the presence of TiF3. TiF3 has dramatically catalyzed the dehydrogenation of LiAlH4. With increasing amount of TiF3, the initial temperature of dehydrogenation decreases to some extent, but it sacrifices the dehydrogenation amount at great cost. 2%(molar fraction) TiF3-doped LiAlH4 begins to release H2 at 80 ℃, 70 ℃ lower than as-received LiAlH4, and can release as much as 6.6%(mass fraction) H2.

Key words: TiF3; LiAlH4; Dehydrogenation; Catalyze

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