Facile uptake and release of ammonia by nickel halide ammines

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)

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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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
557701Crossing Boundaries in Energy StorageDuncan GregoryEngineering & Physical Sciences Research Council (EPSRC)EP/I022570/1CHEM - CHEMISTRY