Hydrogen desorption properties of magnesium hydride catalyzed multiply with carbon and silicon

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Abstract

Abstract Magnesium hydride (MgH<inf>2</inf>) is considered as one of hydrogen storage materials. However, the application is limited because of slow hydrogen kinetics and high thermodynamic stability. In this study, MgH<inf>2</inf> powders were mechanically milled with graphite (C) and/or silicon (Si) powders, and effect of multiple addition of C and Si on hydrogen desorption properties was investigated. The multiple addition caused a decrease of the hydrogen desorption (onset and peak) temperatures more than single addition, and the lowest activation energy for hydrogen desorption, 62 kJ/mol, was obtained from sample powders of (2 mol MgH<inf>2</inf> + 0.5 mol C + 0.5 mol Si). The surface of the sample powders after mechanical milling revealed a good distribution of C on the MgH<inf>2</inf> surface and a presence of finer Si particles.

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APA

Klimkowicz, A., Takasaki, A., Gondek, Ł., Figiel, H., & ͆wierczek, K. (2015). Hydrogen desorption properties of magnesium hydride catalyzed multiply with carbon and silicon. Journal of Alloys and Compounds, 645(S1), S80–S83. https://doi.org/10.1016/j.jallcom.2015.01.178

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