Structural studies of Hydrogenation and Dehydrogenation of Li3N using in situ neutron diffraction
- ORNL
In situ neutron diffraction studies were carried out on the hydrogen absorption and desorption of pure alpha Lithium Nitride. When the sample was exposed to deuterium gas (2H2) at 150C we observed no absorption for twelve hours. We observed an incomplete reaction between the Nitride and D2 at 200C with a 4% uptake. At 250C we observed a total of 7.2% hydrogen uptake. Interestingly we also observed a change in the volume of Li Imide during absorption and desorption at 250C indicating a possible stoichiometry change during this process. At the end of the experiment when the sample was cooled down to room temperature we observed two cubic phases in the sample with slightly different lattice parameters. This implies that in situ studies of the material are crucial to understand the reaction mechanism as the quenched sample exhibits rather different behavior than the sample under reaction conditions.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 931981
- Journal Information:
- Journal of Physical Chemistry C, Vol. 111
- Country of Publication:
- United States
- Language:
- English
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