Hydrolysis of AlLi/NaBH4 system promoted by Co powder with different particle size and amount as synergistic hydrogen generation for portable fuel cell

► Designed Al-Li-Co/NaBH4 systems yielded 100% hydrogen at 323 K. ► Hydrogen generation rates were regulated by different Co powder. ► Formation of Al0.94Co1.06 alloy decreased particle size of milled Al alloy. ► The underlying hydrolysis mechanism was elaborated.