【摘 要】
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The effects of sulfuric acid concentration,reaction temperature,potential-scanning rate and surfactants on electrochemical behavior of V5+ ion on platinum elect
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The effects of sulfuric acid concentration,reaction temperature,potential-scanning rate and surfactants on electrochemical behavior of V5+ ion on platinum electrodes were investigated.In voltammetric curves of V5+ ion there are two reduction peaks corresponding to reductions of V5+ to V4+(R2)and V5+ to V3+(R1),which are irreversible and quasi-reversible processes respectively.Oxidation peak of V3+ to V5+ is intensively affected by pH values on the electrode surface and scanning-potential rates.Only stronger acidity on the electrode surface and faster scanning-potential rates can lead to appearance of this oxidation peak.The neutral surfactant(PCBE)and cationic surfactant(CTAB)retard the V5+ electroreduction.The anionic surfactant(SDS),even at a very low concentration,increases the currents of both the reduction peaks R1 and R2,and the oxidation peak involves with the oxidation of H2 to H+.
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