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- W2020152751 abstract "The steady-state reduction of oxygen in O2-saturated 2 N H2SO4 solution was obtained at constant current on the front side of a Pt foil diaphragm before and after strong anodization of the back side. Strong anodization converts the Pt to a PtO alloy. In all cases, the overvoltage for O2 reduction was less at the PtO alloy than at the Pt cathode. This enhanced catalytic activity of Pt containing dissolved oxygen is interpreted in terms of the band approximation model of metals. The dissolved oxygen in such high concentrations generates a 2p-band in the alloy which interacts with the 5d- and 6s-bands of the Pt. Electrons spill into the 5d-band causing a raising of the Fermi level of the metal with respect to the energy distribution of adsorbed species on the electrode surface. Consequently, it requires less cathodic polarization to transfer electrons from the metal to the species adsorbed on the metal surface by quantum mechanical tunnelling or by passing over the potential energy barrier." @default.
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- W2020152751 date "1975-04-01" @default.
- W2020152751 modified "2023-10-18" @default.
- W2020152751 title "On the reduction of oxygen at platinum—oxygen alloy diaphragm electrodes" @default.
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- W2020152751 doi "https://doi.org/10.1016/0013-4686(75)90004-3" @default.
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