您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

[PDF Download]    [Flash Online]

    

Hydrogen sorption properties of Ti-Zr hydride doped NaAlH4
ZHUANG Peng-hui(庄鹏辉), LIU Xiao-peng(刘晓鹏), LI Zhi-nian(李志念),
WANG Shu-mao(王树茂), JIANG Li-jun(蒋利军), LI Hua-ling(李华玲)

General Research Institute for Nonferrous Metals, Beijing 100088, China

Abstract: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.

 

Key words: hydrogen storage materials; sodium alanates; Ti-Zr hydride dopant

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn