DICP OpenIR
Subject Area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)
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2011-09-15
ISSN待补充
DOI10.1021/jp2052695
Volume115Issue:36Pages:18035-18041
Indexed BySCI
SubtypeArticle
Department19
Funding Project1901
Contribution Rank1,1
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordN-H SYSTEM ; HYDROGEN STORAGE PROPERTIES ; MAGNESIUM BOROHYDRIDE ; CRYSTAL-STRUCTURES ; COMPLEX HYDRIDE ; DESORPTION ; LIBH4 ; REVERSIBILITY ; CA(BH4)(2) ; MG(BH4)(2)
AbstractImproved 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.
Language英语
WOS IDWOS:000294701600054
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/115419
Collection中国科学院大连化学物理研究所
Corresponding AuthorZhang Y(张耀); Xiong ZT(熊智涛)
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
Recommended Citation
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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