Improved hydrogen storage performance of Ca(BH4)2: a synergetic effect of porous morphology and in situ formed TiO2

被引:42
作者
Gu, Jian [1 ,2 ]
Gao, Mingxia [1 ,2 ]
Pan, Hongge [1 ,2 ]
Liu, Yongfeng [1 ,2 ]
Li, Bo [1 ,2 ]
Yang, Yanjing [1 ,2 ]
Liang, Chu [1 ,2 ]
Fu, Hongliang [1 ,2 ]
Guo, Zhengxiao [3 ]
机构
[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
[3] UCL, Dept Chem, London WC1H 0AJ, England
基金
中国国家自然科学基金;
关键词
CALCIUM BOROHYDRIDE; REVERSIBILITY; HYDRIDES; ABSORPTION; CATALYSIS; ADDITIVES; RELEASE; SIZE;
D O I
10.1039/c2ee24121h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A porous Ca(BH4)(2)-based hydride, CaB2H7, with nano-TiO2 introduced in situ, was successfully synthesized via mixing Ca(BH4)(2) with Ti(OEt)(4) followed by heat treatment. The effects of the porous structure and introduction of TiO2 on both the non-isothermal and isothermal hydrogen desorption-absorption properties of the porous system were systematically investigated. The results show significant improvements on both the kinetics and thermodynamics of hydrogen desorption-absorption of the porous CaB2H7-0.1TiO(2) system, compared with the dense Ca(BH4)(2). The desorption peak temperature is reduced by more than 50 degrees C and sorption capacity of ca. 5 wt% H-2 is rapidly achieved below 300 degrees C. The porous structure was retained in the dehydrogenated products, and rapid hydrogen absorption, approximately 80% of the desorption capacity, is obtained upon heating the product, post-dehydrogenated at 300 degrees C for 1 h, to 350 degrees C at 90 bar H-2. External addition of nano-TiO2 also enhances the hydrogen storage properties of Ca(BH4)(2), but to a lesser extent, compared with the synergetic effect of the porous structure and the in situ formed nano-TiO2. In addition, desorption-absorption mechanisms of the porous CaB2H7-0.1TiO(2) system are also proposed.
引用
收藏
页码:847 / 858
页数:12
相关论文
共 37 条
[21]   Magnesium nanowires: Enhanced kinetics for hydrogen absorption and desorption [J].
Li, Weiyang ;
Li, Chunsheng ;
Ma, Hua ;
Chen, Jun .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (21) :6710-+
[22]   Mechanisms for the enhanced hydrogen desorption performance of the TiF4-catalyzed Na2LiAlH6 used for hydrogen storage [J].
Liu, Yongfeng ;
Wang, Fenghuai ;
Cao, Yanhui ;
Gao, Mingxia ;
Pan, Hongge ;
Wang, Qidong .
ENERGY & ENVIRONMENTAL SCIENCE, 2010, 3 (05) :645-653
[23]   Size-Dependent Kinetic Enhancement in Hydrogen Absorption and Desorption of the Li-Mg-N-H System [J].
Liu, Yongfeng ;
Zhong, Kai ;
Luo, Kun ;
Gao, Mingxia ;
Pan, Hongge ;
Wang, Qidong .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (05) :1862-1870
[24]   Hydrothermal synthesis and thermodynamic properties of 2CaO•3B2O3•H2O [J].
Liu, Z.-H. ;
Huang, H.-S. ;
Zuo, C.-F. .
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2007, 89 (02) :655-658
[25]   Effect of Transition Metal Fluorides on the Sorption Properties and Reversible Formation of Ca(BH4)2 [J].
Minella, Christian Bonatto ;
Garroni, Sebastiano ;
Pistidda, Claudio ;
Gosalawit-Utke, R. ;
Barkhordarian, Gagik ;
Rongeat, Carine ;
Lindemann, Inge ;
Gutfleisch, Oliver ;
Jensen, Torben R. ;
Cerenius, Yngve ;
Christensen, Jeppe ;
Dolores Baro, Maria ;
Bormann, Ruediger ;
Klassen, Thomas ;
Dornheim, Martin .
JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (05) :2497-2504
[26]   Thermodynamical stability of calcium borohydride Ca(BH4)2 [J].
Miwa, Kazutoshi ;
Aoki, Masakazu ;
Noritake, Tatsuo ;
Ohba, Nobuko ;
Nakamori, Yuko ;
Towata, Shin-ichi ;
Zuettel, Andreas ;
Orimo, Shin-ichi .
PHYSICAL REVIEW B, 2006, 74 (15)
[27]   Reversibility of the hydrogen desorption from NaBH4 by confinement in nanoporous carbon [J].
Ngene, Peter ;
van den Berg, Roy ;
Verkuijlen, Margriet H. W. ;
de Jong, Krijn P. ;
de Jongh, Petra E. .
ENERGY & ENVIRONMENTAL SCIENCE, 2011, 4 (10) :4108-4115
[28]   Reversibility of the hydrogen desorption from LiBH4: a synergetic effect of nanoconfinement and Ni addition [J].
Ngene, Peter ;
van Zwienen, M. ;
de Jongh, Petra E. .
CHEMICAL COMMUNICATIONS, 2010, 46 (43) :8201-8203
[29]   The crystal structure of the first borohydride borate, Ca3(BD4)3(BO3) [J].
Riktor, M. D. ;
Filinchuk, Y. ;
Vajeeston, P. ;
Bardaji, E. G. ;
Fichtner, M. ;
Fjellvag, H. ;
Sorby, M. H. ;
Hauback, B. C. .
JOURNAL OF MATERIALS CHEMISTRY, 2011, 21 (20) :7188-7193
[30]   Calcium borohydride for hydrogen storage:: Catalysis and reversibility [J].
Roennebro, Ewa ;
Majzoub, Eric H. .
JOURNAL OF PHYSICAL CHEMISTRY B, 2007, 111 (42) :12045-12047