Facile Uptake and Release of Ammonia by Nickel Halide Ammines.
Facile Uptake and Release of Ammonia by Nickel Halide Ammines.
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DOI：
10.1002/cssc.201600140
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发表时间：
2016-06-08
期刊：
影响因子：
8.4
通讯作者：
Gregory, Duncan H.
中科院分区：
文献类型：
--
作者：
Breternitz, Joachim;Vilk, Yury E.;Giraud, Elsa;Reardon, Hazel;Hoang, Tuan K. A.;Godula-Jopek, Agata;Gregory, Duncan H.
虽然储氢材料在满足移动应用的性能要求方面遇到了很大的困难，但替代燃料电池原料，如氨，可以在高容量下安全地储存在固态中。我们在这里描述了NiX2-NH3(X=Cl，Br1，I)体系，并展示了它们对NH3存储的特殊适应性(在400 K开始解吸时，高达43 重量的 %NH3)。用粉末X射线衍射仪(PXD)、傅立叶变换红外光谱(FTIR)和扫描电子显微镜(SEM)研究了NH3吸附引起的结构效应。在高温下释放NH3之后，进行了 原位X射线衍射。对系统的循环能力和空气稳定性也进行了探讨。六胺中的NH3通过三步反应分别生成二胺、单胺和二卤化镍，在室温下很容易发生氨化反应。六胺在暴露几个小时后不会与空气发生反应。
Although major difficulties are experienced for hydrogen‐ storage materials to meet performance requirements for mobile applications, alternative fuel cell feedstocks such as ammonia can be stored in the solid state safely at high capacity. We herein describe the NiX2‐NH3 (X=Cl, Br, I) systems and demonstrate their exceptional suitability for NH3 storage (up to 43 wt % NH3 with desorption that begins at 400 K). The structural effects that result from the uptake of NH3 were studied by powder X‐ray diffraction (PXD), FTIR spectroscopy and SEM. NH3 release at elevated temperatures was followed by in situ PXD. The cycling capabilities and air stability of the systems were also explored. NH3 is released from the hexaammines in a three‐step process to yield the diammine, monoammine and NiX2 dihalides respectively and (re)ammoniation occurs readily at room temperature. The hexaammines do not react with air after several hours of exposure.
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影响因子：
--
作者：
Christensen, CH;Sorensen, RZ;Norskov, JK
通讯作者：
Norskov, JK
影响因子：
4.7
作者：
Elmoe, TD;Sorensen, RZ;Johannessen, T
通讯作者：
Johannessen, T
影响因子：
3.3
作者：
Leineweber, A;Jacobs, H
通讯作者：
Jacobs, H
DOI：
10.1107/s0108768106053870
发表时间：
2007-02-01
影响因子：
1.9
作者：
Malcherek, Thomas;Schlueter, Jochen
通讯作者：
Schlueter, Jochen
影响因子：
6.1
作者：
Brown, ID
通讯作者：
Brown, ID