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Synthesis and characterization of two new amide chloride compounds: Potential H2 storage materials

DOI: 10.1016/j.ijhydene.2014.12.044 DOI Help

Authors: Rosalind A. Davies (University of Birmingham) , Paul A. Anderson (University of Birmingham)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: International Journal Of Hydrogen Energy

State: Published (Approved)
Published: January 2015
Diamond Proposal Number(s): 3909

Open Access Open Access

Abstract: Two new amide chloride phases, with approximate stoichiometries Li7(NH2)6Cl and Li6Mg0.5(NH2)6Cl, have been identified by powder X-ray diffraction, and their hydrogen storage properties studied. Both phases released hydrogen on reaction with LiH at a lower temperature than observed for lithium amide, and ammonia release was suppressed. The chloride ions were maintained within the structure after hydrogen desorption and rehydrogenation, raising the possibility that the materials might be cycled. The desorption properties of Li7(NH2)6Cl were found to be similar to the previously reported amide chloride Li4(NH2)3Cl but with a much reduced gravimetric penalty owing to chloride incorporation. Rehydrogenation of the imide products of reaction of both Li7(NH2)6Cl and Li6Mg0.5(NH2)6Cl with LiH occurred more readily at 90 bar and 300 °C than that of Li4(NH2)3Cl.

Journal Keywords: Complex Hydrides; Hydrogen Storage; Lithium; Magnesium; Amide Chlorides; Powder X-Ray Diffraction

Diamond Keywords: Hydrogen Storage

Subject Areas: Chemistry, Materials, Energy

Instruments: I11-High Resolution Powder Diffraction

Added On: 02/02/2015 09:40


Discipline Tags:

Energy Storage Earth Sciences & Environment Sustainable Energy Systems Energy Climate Change Physical Chemistry Chemistry Inorganic Chemistry

Technical Tags:

Diffraction X-ray Powder Diffraction