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学科主题物理化学
Improved Dehydrogenation Properties of Calcium Borohydride Combined with Alkaline-Earth Metal Amides
Chu, Hailiang; Wu, Guotao; Zhang, Yao; Xiong, Zhitao; Guo, Jianping; He, Teng; Chen, Ping; Zhang Y(张耀); Xiong ZT(熊智涛)
刊名JOURNAL OF PHYSICAL CHEMISTRY C
2011-09-15
ISSN待补充
DOI10.1021/jp2052695
115期:36页:18035-18041
收录类别SCI
文章类型Article
部门归属19
项目归属1901
产权排名1,1
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science
关键词[WOS]N-H SYSTEM ; HYDROGEN STORAGE PROPERTIES ; MAGNESIUM BOROHYDRIDE ; CRYSTAL-STRUCTURES ; COMPLEX HYDRIDE ; DESORPTION ; LIBH4 ; REVERSIBILITY ; CA(BH4)(2) ; MG(BH4)(2)
英文摘要Improved Dehydrogenation Properties of Calcium Borohydride Combined with Alkaline-Earth Metal Amides; Promotion of dehydrogenation based on the interaction of [BH4](-) and [NH2](-) sources has been demonstrated to be one of the most effective approaches in developing an advanced borohydride/amide hydrogen storage combined system. The Ca(BH4)(2)-2Mg(NH2)(2) and Ca(BH4)(2)-2Ca(NH2)(2) composites are thereby synthesized in the present work. It is found that the binary combined systems exhibit an onset dehydrogenation temperature of similar to 220 degrees C, which is similar to 100 degrees C lower than that of pristine Ca(BH4)(2). The hydrogen release measurements for Ca(BH4)(2)-2Mg(NH2)(2) and Ca(BH4)(2)-2Ca(NH2)(2) samples below 480 degrees C show desorption amounts of 8.3 and 6.8 wt % hydrogen, respectively. The dehydrogenation of both samples is accompanied by an ammonia emission of <1.4 mol %. The characterizations such as X-ray diffraction and nuclear magnetic resonance on the postdehydrogenated samples indicate that the dehydrogenation reactions are in the pathways of Ca(BH4)(2) + 2 Mg(NH2)(2) -> 1/3 [Ca3Mg6(BN2)(6)] + 8 H-2 and Ca(BH4)(2) + 2 Ca(NH2)(2) -> 1/3 Ca-9(BN2)(6) + 8 H-2, respectively. Compared with pristine Ca(BH4)(2) sample, both possess lower activation energy for dehydrogenation. Further investigation reveals that the interaction of B-H and N-H may be one of main driving forces for dehydrogenation of borohydride/amide combined system.
语种英语
WOS记录号WOS:000294701600054
引用统计
被引频次:19[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/115419
专题中国科学院大连化学物理研究所
通讯作者Zhang Y(张耀); Xiong ZT(熊智涛)
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
推荐引用方式
GB/T 7714
Chu, Hailiang,Wu, Guotao,Zhang, Yao,et al. Improved Dehydrogenation Properties of Calcium Borohydride Combined with Alkaline-Earth Metal Amides[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2011,115(36):18035-18041.
APA Chu, Hailiang.,Wu, Guotao.,Zhang, Yao.,Xiong, Zhitao.,Guo, Jianping.,...&熊智涛.(2011).Improved Dehydrogenation Properties of Calcium Borohydride Combined with Alkaline-Earth Metal Amides.JOURNAL OF PHYSICAL CHEMISTRY C,115(36),18035-18041.
MLA Chu, Hailiang,et al."Improved Dehydrogenation Properties of Calcium Borohydride Combined with Alkaline-Earth Metal Amides".JOURNAL OF PHYSICAL CHEMISTRY C 115.36(2011):18035-18041.
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