Hydrogen generation by reaction of Al-M (M = Fe,Co,Ni) with water

The addition of Fe, Co and Ni to Al significantly improves the production of hydrogen in Al-H2O reaction. The total mass of Fe and Ni is less than the mass of Co. However, the hydrogen evolution induced by Co reaches similar to 1000 ml g(-1) and the induction time shortens to 1.4 hat 35 degrees C. After the initial induced reaction, Al rapidly reacts with water even at 25 degrees C and the yield reached 90.0%. The additional Fe, Co and Ni combined with Al forms the galvanic cell and induce Al-H2O reaction. The Al(OH)(n) hydrate formed in the reaction accelerates the removal of alumina and the reaction rate of Al-H2O reaction, along with a decrease in the corrosion potential and an increase in the corrosion current. Beside that, both the pH and released heat in the local domain favor the Al-H2O reaction. (C) 2016 Elsevier Ltd. All rights reserved.