Breternitz, J., Vilk, Y. E., Giraud, E., Reardon, H., Hoang, T. K.A., Godula-Jopek, A. and Gregory, D. H. (2016) Facile uptake and release of ammonia by nickel halide ammines. Chemsuschem, 9(11), pp. 1312-1321. (doi: 10.1002/cssc.201600140) (PMID:27137479)
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Abstract
While hydrogen storage materials experience major difficulties in meeting 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 beginning at 400 K). The structural effects resulting from the uptake of NH3 were studied by powder X-ray diffraction (PXD), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (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 hexa-ammines in a 3-step process to yield the di-ammine, mono-ammine and the NiX2 dihalides respectively and (re)ammoniation occurs readily at room temperature. The hexa-ammines do not react with air after several hours of exposure.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hoang, Dr Tuan and Gregory, Professor Duncan and Vilk, Mr Yury |
| Authors: | Breternitz, J., Vilk, Y. E., Giraud, E., Reardon, H., Hoang, T. K.A., Godula-Jopek, A., and Gregory, D. H. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Chemsuschem |
| Publisher: | Wiley-VCH Verlag |
| ISSN: | 1864-5631 |
| ISSN (Online): | 1864-564X |
| Published Online: | 03 May 2016 |
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