Synthesis of catalyzed magnesium hydride with low absorption/desorption temperature

Authors

Xuebin Yu, University of WollongongFollow
Y H. Guo, Fudan University Shanghai China
Z X. Yang, University of Wollongong
Zaiping Guo, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

31380

Publication Details

Yu, X, Guo, YH, Yang, ZX, Guo, Z, Liu, HK & Dou, SX (2009), Synthesis of catalyzed magnesium hydride with low absorption/desorption temperature, Scripta Materialia, 61(5), pp. 469-472.

Abstract

Highly activated MgH₂ was synthesized by ball-milling Mg with Ti_0.4Cr_0.15Mn_0.15V_0.3 alloy under 30 atm hydrogen pressure for 5 h. The catalyzed MgH₂showed improved absorption/desorption properties, desorbing 6.15 wt.% hydrogen in 100 min at 250^°C and absorbing 5.66 wt.% hydrogen within 150 min even at 80^°C. Scanning and transmission electron microscopy results revealed that the nanosized Ti_0.4Cr_0.15Mn_0.15V_0.3 alloy were embedded in the Mg aggregates, which increase the hydrogen atomic diffusivity in the bulk Mg, resulting in the improved kinetics.