Generation of hydrogen by aluminium oxidation in aquaeous solutions at low temperatures

Solvometallurgical recovery of cobalt from lithium-ion battery cathode materials using deep-eutectic solvents

“…Reduction of cobalt(III) by aluminium is favoured by thermodynamics, but aluminium is more prone to side reactions such as reduction of water and protons, both causing formation of hydrogen gas. 8,10,61,70,71 This was evidenced by formation of plenty of gas bubbles and a pressure build-up in the leaching vials, but the gas could not be identified. Joulié et al reported that a 750% excess of aluminium metal is required to reduce cobalt (III) efficiently during leaching of LIB cathode materials by sulphuric acid.…”

Semisolid Al–Ga composites fabricated at room temperature for hydrogen generation

“…Besides, an alkaline solution can destroy the oxide lm. [5][6][7] Under this condition, the oxide layer is destroyed by hydroxide ions, making the metal free to react with water to produce hydrogen at a higher speed. However, since both acid and alkaline solutions are highly corrosive, they are not safe for practical applications.…”

Impact of Li Addition in Al-Rich Alloys on Hydrogen Production in Water

“…However, the stable alumina film on the Al surface prevents the Al-water reaction. Thus, high temperature is normally required for the reaction [12][13][14][15][16][17][18][19][20].…”