2007. - V. 21. - N 3(71). - P. 58-60
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Dissolution of polycrystalline bismuth electrode in the sulphuric acid at the different concentrations of theourea (0.001-0.5 mol/l) has been investigated by the method of voltamperometry with the potential scan rate within 0.002-0.2 V/s. It was found, that in dependence on the concentration, the theourea can facilitate as well as inhibit the process of dissolution of bismuth. The inhibition of dissolution can be explained by a blocking effect on the electrode surface caused by some of insoluble products, one of which may be the bismuth oxide.
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