TY - JOUR
T1 - Fabrication of ball-milled MgO–Mg(OH)2-hydromagnesite composites and evaluation as an air-stable hydrogen storage material
AU - Martinez-Garcia, A.
AU - Navarro-Mtz, A. K.
AU - Reguera, E.
AU - Valera-Zaragoza, M.
AU - Morales-Serna, J. A.
AU - Juarez-Arellano, E. A.
PY - 2020/4/28
Y1 - 2020/4/28
N2 - © 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.
AB - © 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.
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U2 - 10.1016/j.ijhydene.2020.03.020
DO - 10.1016/j.ijhydene.2020.03.020
M3 - Article
SP - 12949
EP - 12960
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
ER -