Hydrogen generation by hydrolysis of Sc-Sn alloy over a wide temperature range as low as 0 C

A series of Sc-Sn alloys are prepared by the arc -melting method and their hydrogen generation performance of hydrolysis in pure water is investigated. It was found that only Sc element reacts with water in Sc-Sn alloy, while Sn element is retained as an elemental metal. The reaction temperature of Sc with water can be reduced below 0 degrees C after Sc and Sn are alloyed. The Sc 3 Sn 2 alloy has the best hydrogen generation performance. Its hydrogen conversion rate is up to 90% at 0 degrees C for 100 min as well as when the water temperature dropped from 60 degrees C to 0 degrees C, the average conversion rate in the first 30 min only dropped from 19.95 mL / min center dot g to 14.31 mL / min center dot g. The hydrogen generation performance of Sc-Sn alloys depends on the reaction activity after Sc and Sn alloying, the effect of micro galvanic cells and the solidification microstructure in the alloy ingot.