CPC C25B 1/04 (2013.01) [H01M 8/188 (2013.01)] | 23 Claims |
1. A method for producing hydrogen, the method comprising the steps of:
(i) reducing a mediator by four or more electrons to yield a reduced mediator;
(ii) oxidising a reduced mediator to yield a mediator, and reducing protons to yield hydrogen;
wherein the reduced mediator of step (i) is used as the reduced mediator of step (ii), or the mediator of step (ii) is used as the mediator of step (i);
wherein the mediator in step (i) is (a) reduced by five or more electrons and/or (b) provided in an aqueous electrolyte solution at a concentration of at least 2 mM.
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