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        ꖘO:Fe-2e→Fe2+
        EO(Fe/Fe2+)=0.44V
        ꎘO:2H++2e→2[H]→H2
        EO(H+/H2)=0.00V
        O2+H2O+4e→4OH-
        EO(O2/OH-)=0.41V

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