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HomeMaterials Science ForumMaterials Science Forum Vol. 852Improved Dehydriding Properties of NaMgH3...

Improved Dehydriding Properties of NaMgH₃ Perovskite Hydride by Addition of Graphitic Carbon Nitride

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Abstract:

NaMgH₃ perovskite hydride and graphitic carbon nitride (g-C₃N₄) powder with multi-layer structure have been synthesized by high-energy ball-milling and heating-decomposition method respectively. In comparison with pristine NaMgH₃ hydride, the as–milled NaMgH₃+5wt.% g-C₃N₄(NMH-5CN) composite presents better dehydriding kinetic properties and lower onset decomposition temperature. The onset decomposition temperature of NMH-5CN composite can be decreased about 87K, the hydrogen-desorbed amount is about 3.2 wt. % within 40min, and 1.4 wt. % within 10min at 638K, and the Kissinger analysis demonstrated that the activation energy (ΔE) of the first and second dehydrogenation step for NMH-5CN can be reduced about 40 kJ mol^-1 and 22.4 kJ mol^-1, respectively. The results suggest that g-C₃N₄ is an effective catalyst for the improvement of dehydriding properties of NaMgH₃perovskite hydride.

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Materials Science Forum (Volume 852)

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502-508

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.852.502

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Online since:

April 2016

Authors:

Song Tao*, Zhong Min Wang, Jia Jun Li, Jian Qiu Deng, Huai Ying Zhou, Qing Rong Yao

Keywords:

Catalytic Effect, Dehydriding Kinetic Property, Graphitic Carbon Nitride, NaMgH₃, Perovskite Structure

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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