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- W2015740644 abstract "The electrochemical behaviour of silver in 0·5M NaOH solution containing different concentrations (0·0005–0·007M) of sodium sulphide was studied using cyclic voltammetry, potentiodynamic, and current transient techniques. The anodic sweep of the voltammogram in NaOH was characterised by the appearance of three anodic peaks A3, A4 and A5 that are related to the formation of AgO−, Ag2O and Ag2O2 on the electrode surface. The presence of Na2S in NaOH solution resulted in the appearance of two additional anodic peaks A1 and A2. These two peaks are related to the formation of Ag2S and S, respectively. The addition of Na2S also increases the heights of the anodic peaks A3, A4 and A5. The increase in the current density of the anodic peaks A3 and A4 is mainly due to surface enlargement resulting from pitting and the precipitation of sulphur on the electrode surface. Also, the large increase in the current density of the anodic peak A5 is due to the formation of the soluble SO2−4 compound. The morphology of the electrode surface was examined by scanning electron microscopy. Characterisation of the corrosion products formed anodically on the electrode surface was undertaken using X-ray diffraction analysis. Potentiostatic current–time transients showed that the formation of Ag2S, S and Ag2O layers involves a nucleation and growth mechanism under diffusion control." @default.
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- W2015740644 date "2005-03-01" @default.
- W2015740644 modified "2023-09-26" @default.
- W2015740644 title "Electrochemical behaviour of polycrystalline silver in 0·5M NaOH containing sulphide ions" @default.
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- W2015740644 doi "https://doi.org/10.1179/174327805x29903" @default.
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