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- W1981562699 abstract "Abstract Graphite hydrogen sulphate (GHS) electrodes were made in situ from crystalline graphite in 5–12 M H2SO4 by anodic polarization. Two inorganic anodic oxidations, 2 Cl− → Cl2 and Mn2+ → Mn3+, were performed under these conditions. In both cases, the inorganic anode process started at potentials negative to the intercalation potential. Partial current-voltage curves were established by continuous product analyses. They yield Tafel lines with a high b of the order of 200 mV, which is indicative for an inner Helmholtz plane mechanism. No discontinuity of the Tafel lines at the intercalation potential can be observed. We conclude from this that the intercalation process and the anodic oxidation of dissolved chloride or manganese ions are two independent electrode processes, proceeding at the edge and cleavage surface of the graphite, respectively. Redox catalysis via the intercalation compound is kinetically hindered due to steric reasons and the movement of heavy hydrogen sulphate counter ions. The voltammetric results are confirmed by corrosion experiments. Corrosion of the GHS electrode in the presence of Cl− or Mn2+ is limited by the anodic process." @default.
- W1981562699 created "2016-06-24" @default.
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- W1981562699 date "1991-03-01" @default.
- W1981562699 modified "2023-09-23" @default.
- W1981562699 title "Graphite hydrogen sulphate as an electrode material for inorganic anodic oxidations" @default.
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- W1981562699 doi "https://doi.org/10.1016/0022-0728(91)85034-m" @default.
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