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Compositional flexibility in Li–N–H materials: implications for ammonia catalysis and hydrogen storage

DOI: 10.1039/D1CP02440J DOI Help

Authors: Joshua W. Makepeace (University of Birmingham) , Jake M. Brittain (University of Oxford; ISIS Pulsed Neutron and Muon Facility) , Alisha Sukhwani Manghnani (University of Oxford) , Claire A. Murray (Diamond Light Source) , Thomas J. Wood (ISIS Pulsed Neutron and Muon Facility) , William I. F. David (University of Oxford; ISIS Pulsed Neutron and Muon Facility)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Chemistry Chemical Physics , VOL 420

State: Published (Approved)
Published: July 2021
Diamond Proposal Number(s): 14926

Open Access Open Access

Abstract: Li–N–H materials, particularly lithium amide and lithium imide, have been explored for use in a variety of energy storage applications in recent years. Compositional variation within the parent lithium imide, anti-fluorite crystal structure has been related to both its facile storage of hydrogen and impressive catalytic performance for the decomposition of ammonia. Here, we explore the controlled solid-state synthesis of Li–N–H solid-solution anti-fluorite structures ranging from amide-dominated (Li4/3(NH2)2/3(NH)1/3 or Li1.333NH1.667) through lithium imide to majority incorporation of lithium nitride–hydride (Li3.167(NH)0.416N0.584H0.584 or Li3.167NH). Formation of these solid solutions is demonstrated to cause significant changes to the thermal stability and ammonia reactivity of the samples, highlighting the potential use of compositional variation to control the properties of the material in gas storage and catalytic applications.

Diamond Keywords: Hydrogen Storage

Subject Areas: Chemistry, Materials, Energy

Instruments: I11-High Resolution Powder Diffraction

Added On: 08/07/2021 10:27


Discipline Tags:

Energy Storage Energy Physical Chemistry Catalysis Chemistry Materials Science Inorganic Chemistry

Technical Tags:

Diffraction X-ray Powder Diffraction