Hydrolysis hydrogen generation medium regulated by alkali metal cations for Mg-based alloy - Green seawater modification strategy

Abstract To optimize the hydrolysis hydrogen generation process of Mg-based alloy and solve the problem of energies shortage without environmental risk, a green and reasonable regulation strategy of hydrolysis medium is proposed to ensure the conversion from grey hydrogen to green hydrogen. In this work, green modification hydrolysis medium strategy employed neutral alkali metal cations instead of acidized/alkalized ions is proposed to utilize for hydrolysis of (Mg10Ni)10Ce alloy. The green regulation of seawater by introducing the low cost neutral alkali metal cations is tried. The results are as follows: The as-cast (Mg10Ni)10Ce alloy hydrolysis induction period is the shortest and the H2 yield is the highest with 173.38 mL g−1 in KCl solution within 20 min at 25 °C. The hydrolysis hydrogen generation yield of modified seawater by the neutral alkali metal cations are first higher and then lower than that in the seawater. The hydrolysis process of (Mg10Ni)10Ce in alkali metal cations medium confirms that the type and content of ions has significant effects on the diffusion and transmission process of the medium. It is expected to lay a solid foundation for the development of green portable hydrogen generators and the widespread of clean hydrogen energy and emission reduction.