Pan et al. solve these problems in a high-yield, hydrometallurgical process based on hydrogen-lead oxide fuel cell reactions, ... The spent lead paste (100 g) was added to 10% NaOH ...

Water can be split into hydrogen and oxygen using multi-step chemical cycles at temperatures that are feasible with solar reactors. One of those cycles is based on manganese(III)oxide (Mn2O3) that is ...