Investigations into the interaction between hydrogen and calcium nitride
- 6 May 2003
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 13 (7) , 1676-1680
- https://doi.org/10.1039/b211563h
Abstract
The interaction between hydrogen and α-Ca3N2 has been investigated by temperature programmed adsorption–desorption and pressure–composition (P–C) isotherms and also by X-ray powder diffraction. We find that hydrogen adsorption by Ca3N2 begins at temperatures around 300 °C. Approximately 3.5 H atoms can be adsorbed by one Ca3N2 molecule. Only half of the adsorbed hydrogen can be desorbed at temperatures above 350 °C. Addition of CaH2 enhances the reversibility of H-adsorption in the Ca3N2 sample. As demonstrated in the present work, almost all of the hydrogen adsorbed by the Ca3N2–CaH2 sample (molar ratio 1 ∶ 1) can be released with Ca2NH as the final product.Keywords
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