LAUSR

Abstract The Mg-bearing Al-Ga-In-Sn alloy with more stable hydrogen generation rate during hydrolysis reaction was synthesized, which is great suitable for the on-board hydrogen supply applications. The test results show that the hydrogen release rate of the Mg-bearing alloys could be effectively controlled. In particular, when the Mg dosage is 0.5 wt.%, the average hydrogen generation rate can even be reduced to 2.1 ml/min·g, while the total energy conversion efficiency of Al has not been affected and still reaches to nearly 100%. Further analysis shows that the reduction of hydrogen production rate during the Al-water reaction process is closely related to the changes of the phase compositions and the microstructure of grain boundary phase (GB-phase) particles in these alloys. Moreover, the electrochemical tests further clarify the reactivity of the alloys with different Mg dosage.