Apparatus and methods of providing diatomic oxygen (O2) using ferrate(VI)-containing compositions

An oxygen dispenser, comprising:

• a first compartment comprising ferrate(VI);
• a second compartment comprising water in the presence of an acid, wherein the amount of the acid in the second compartment in comparison to the amount of the ferrate(VI) in the first compartment is such that there is a stoichiometric molar excess amount of acid in a range of 0 to 100%;
• and
• a respiratory apparatus;
• wherein when in use, the ferrate(VI) in the first compartment is combined with the water and acid in the second compartment to generate oxygen for breathing applications, resulting in an aqueous composition having a pH in the range of pH 1 to pH 8.