Investigations of the Thermally Induced Hydrogen Release of NaBh4, Nh3Bh3 and Their Geopolymer Composites
Investigations of the Thermally Induced Hydrogen Release of NaBh4, Nh3Bh3 and Their Geopolymer Composites
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NaBh4、Nh3Bh3及其地质聚合物复合材料的热释氢研究
DOI:
10.1002/9781119321811.ch10
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
C. H. Rüscher
中科院分区:
文献类型:
--
作者:
Z. Assi;L. Schomborg;C. H. Rüscher
This chapter examines the thermally induced hydrogen release reactions and destruction products of hosting hydrogen storage materials in comparison to the behavior of sodium boronhydride (SB) and ammoniaborane (AB) carried out at temperatures up to 400°C. SB and AB contain 10.6 wt% and 19.6 wt% hydrogen, respectively, and are two of the most iinteresting hydrogen storage materials. SB and AB could be regarded as complexes of borane, X‐BH3, constituted of Lewis base donor and borane Lewis acid. The identification of the reaction steps is of importance for an optimization of the hydrogen release. The thermal investigation of the pristine salts is a prerequisite in understanding the thermal behavior of the corresponding geopolymer‐composites and the role played by the geopolymer framework. The dehydration is typically correlated with an endothermic peak with maximum at about 100°C. Using He as inert gas during the TG/DTA run and evacuating the sample before filling the He gas reveals mass losses of about 3‐4 wt% for geopolymer samples of Si/Al ratios between 0.5 and 2.0. The oxidation of borohydride to cyclic metaborate is accompanied by H2 release, as evidenced by the TIR experiment of SB/KBr conducted in the presence of nitrate tracer (NaNO3).
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DOI:
10.1088/0953-8984/2/25/004
发表时间:
1990
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1002/9781119040293.ch1
发表时间:
2014
期刊:
影响因子:
--
作者:
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通讯作者:
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