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- W2036263530 abstract "By making use of the previously observed fact that oxygen is reduced, in aqueous solutions at surfactant-covered mercury electrodes, to the superoxide stage only, the redox system O2/O2− as well as the spontaneous decay of O2− have been studied. For the standard potential of O2/O2−, E0 = −0.284 V (vs. NHE) has been evaluated, confirming recently published data. The spontaneous decay of O2− is due to a homogeneous disproportionation (k2 = 6 M−1s−1 at pH > 12; at lower pH values, pulse-radiolytic data are confirmed), the supply of hydroperoxyl radicals from the equilibrium (homogeneous rate of protonation, k1 = 5 × 1010 M−1s−1) to the electrode, a slow heterogeneous proton transfer to adsorbed O2−; the enhanced rate of this reaction, in the absence of surfactants, accounts for the normal reversibility of O2/HO2− in alkaline solutions. The superoxide ion is rather sensitive towards traces of impurities; this explains reasonably previously observed discrepancies. Some preliminary experiments refer to the reactivity of O2− towards organic halides resulting in so far rather moderate yields of alkyl hydroperoxides." @default.
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- W2036263530 date "1975-10-10" @default.
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- W2036263530 title "Electrochemical generation and reactivity of the superoxide ion in aqueous solutions," @default.
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- W2036263530 doi "https://doi.org/10.1016/0368-1874(75)85147-1" @default.
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