NH3BH3 AND NaBH4 ENCLOSED IN GEOPOLYMERS AND ZEOLITES

被引：0

作者：

Ruescher, C. H. ^{[1
]}

Schomborg, L. ^{[1
]}

Assi, Z. ^{[1
]}

Buhl, J. C. ^{[1
]}

机构：

[1] Leibniz Univ Hannover, Inst Mineral, Hannover, Germany

来源：

CERAMICS FOR ENVIRONMENTAL SYSTEMS | 2016年 / 257卷

关键词：

CRYSTAL-STRUCTURE; HYDROGEN RELEASE;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Aminonia-borane, NH3BH3 ( = AB) and sodium tetrahydroborate (NaBH4 = SB) can easily be dissolved in sodium aluminate and silicate solutions. Upon mixing they result in immediate gel formation and re-crystallization of AB and SB during drying. In case of AB-GIR-absorption spectra indicate that the geopolymer matrix (= G) consists of mainly sialate units (Si-O-Al-O). Heating experiments to 120, 150 and 300 degrees C show the formation of polyaminoboranes (PAB) and polyiminoborane (PIB). The underlying reactions could he related to hydrogen release in two exothermic peaks observed at around 122 degrees C and 160 degrees C. In the course of further optimizations of the SB content in SB-G the Si/Al ratio of G could slightly increase with increasing the Si/Al ratio between 0.27 and 2.7. The water content of SB-G decreases linearly with the decreasing contribution of the geopolymer matrix. SB-SOD could be crystallized systematically following a hydrothermal soft chemical synthesis technique at 60 degrees C, 80 degrees C and 120 degrees C. The effect of variations in particle and crystallite sizes could be correlated with effective hydrogen release and the water content in the matrix of the SB-SOD.

引用

页码：105 / 118

页数：14

共 20 条

[1]

Barrer R. M., 1982, HYDROTHENUAL CHEM ZE

[2] Synthesis, crystal structure and thermal stability of tetrahydroborate sodalite Na8[AlSiO4]6(BH4)2 [J].

Buhl, JC ;

Gesing, TM ;

Rüscher, CH .

MICROPOROUS AND MESOPOROUS MATERIALS, 2005, 80 (1-3) :57-63

[3]

Buhl JC, 2012, HYDROGEN STORAGE, P49

[4] Synthesis and crystal structure of gallosilicate- and aluminogermanate tetrahydroborate sodalites Na8[GaSiO4]6(BH4)2 and Na8[AlGeO4]6(BH4)2 [J].

Buhl, Josef-C. ;

Gesing, Thorsten M. ;

Hoefs, Tanja ;

Ruescher, Claus H. .

JOURNAL OF SOLID STATE CHEMISTRY, 2006, 179 (12) :3877-3882

[5] Tetrahydroborate sodalite nanocrystals: Low temperature synthesis and thermally controlled intra-cage reactions for hydrogen release of nano- and micro crystals [J].

Buhl, Josef-Christian ;

Schomborg, Lars ;

Ruescher, Claus Henning .

MICROPOROUS AND MESOPOROUS MATERIALS, 2010, 132 (1-2) :210-218

[6] Direct borohydride fuel cells [J].

de Leon, CP ;

Walsh, FC ;

Pletcher, D ;

Browning, DJ ;

Lakeman, JB .

JOURNAL OF POWER SOURCES, 2006, 155 (02) :172-181

[7] Facile solid-phase synthesis of the diammoniate of diborane and its thermal decomposition behavior [J].

Fang, Zhanzhao ;

Luo, Junhong ;

Kang, Xiangdong ;

Xia, Haijie ;

Wang, Sisheng ;

Wen, Wen ;

Zhou, Xingtai ;

Wang, Ping .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2011, 13 (16) :7508-7513

[8] Pyrolytic Decomposition of Ammonia Borane to Boron Nitride [J].

Frueh, Samuel ;

Kellett, Richard ;

Mallery, Carl ;

Molter, Trent ;

Willis, William S. ;

King'ondu, Cecil ;

Suib, Steven L. .

INORGANIC CHEMISTRY, 2011, 50 (03) :783-792

[9] Nanoscaffold mediates hydrogen release and the reactivity of ammonia borane [J].

Gutowska, A ;

Li, LY ;

Shin, YS ;

Wang, CMM ;

Li, XHS ;

Linehan, JC ;

Smith, RS ;

Kay, BD ;

Schmid, B ;

Shaw, W ;

Gutowski, M ;

Autrey, T .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (23) :3578-3582

[10] B-N compounds for chemical hydrogen storage [J].

Hamilton, Charles W. ;

Baker, R. Tom ;

Staubitz, Anne ;

Manners, Ian .

CHEMICAL SOCIETY REVIEWS, 2009, 38 (01) :279-293

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