Fabrication of ball-milled MgO–Mg(OH)<inf>2</inf>-hydromagnesite composites and evaluation as an air-stable hydrogen storage material

A. Martinez-Garcia, A. K. Navarro-Mtz, E. Reguera, M. Valera-Zaragoza, J. A. Morales-Serna, E. A. Juarez-Arellano

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

Resumen

© 2020 Hydrogen Energy Publications LLC A phase stability map of metallic magnesium powder, exposed to environmental conditions for 12 months (Mg-12M) and subjected to different high-energy ball-milling speeds and milling times, was constructed. Mg-12M−160 [½MgO-⅓Mg(OH)2-⅙hydromagnesite] and Mg-12M−640 [¼MgO-⅝Mg(OH)2-⅛hydromagnesite] composites were obtained changing the milling conditions. The correlation among the accumulated energy (ΔEaccum), the impact energy (ΔEhit), and the phase stability under different high-energy ball-milling conditions were generated. The Mg-12M−160 composite had a hydrogen storage capacity of 0.63 wt% at −196 °C and 8.3 bar, although further hydrogen adsorption at higher pressures is expected. Structural defects play a significant role in the adsorption capacity. A representation of the possible absorption mechanism is proposed.
Idioma originalInglés estadounidense
Páginas (desde-hasta)12949-12960
Número de páginas12
PublicaciónInternational Journal of Hydrogen Energy
DOI
EstadoPublicada - 28 abr 2020
Publicado de forma externa

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