Hydrogen sorption properties of Ti-Zr hydride doped NaAlH4

摘要：

The as-prepared Ti-Zr hydride powder is used as dopant to improve hydrogen storage properties of NaAlH4 upon mechanical milling under argon atmosphere.The as-milled sample is investigated by X-ray diffraction(XRD),scanning electron microscopy(SEM) and Sievert’s technology test.It is observed that Ti-Zr hydride doped NaAlH4 discharges 2.7％ and 4.0％ (mass fraction) of hydrogen in 40 min and 11 h at 160 ℃,respectively,and keeps its reversible dehydrogenation capacity at 4.0％ (mass fraction) after 10 hydrogenation/dehydrogenation cycles.These results show the Ti-Zr hydride doped NaAlH4 has good reversible hydrogen storage capacity and kinetics.XRD and SEM investigations also show that the doped Ti-Zr hydride uniformly distributes in NaAlH4 substrate and keeps stable during the hydrogenation/dehydrogenation cycle,indicating that Ti-Zr hydride plays the main surface-catalytic role on improving reversible hydrogen storage properties of NaAlH4.

关键词： hydrogen storage materials sodium alanates Ti-Zr hydride dopant

作者: ZHUANG Peng-hui LIU Xiao-peng LI Zhi-nian WANG Shu-mao JIANG Li-jun LI Hua-ling

作者单位: General Research Institute for Nonferrous Metals,Beijing 100088,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）