Kationok hatása platina anódok polarizációs potenciáljára, illetve az oxigéntúlfeszültségre

Erdey-Grúz, Tibor and Safarik, Imre (1957) Kationok hatása platina anódok polarizációs potenciáljára, illetve az oxigéntúlfeszültségre. MAGYAR KÉMIAI FOLYÓIRAT (1895-1996), 63 (8). pp. 221-229. ISSN 0025-0155

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Abstract

The mechanism o f the processes at the Pt-anode in H2SO4-solutions o f different concentrations was invetigated by studying the effects of Li , N a +, К , NH.), Mg21, Z n2 , А13т ions on the polarisation potential. It was found, that the presence of metallic ions in the H2S 0 4-solutions resu lted in increased polarisation at the Pt-anode and in increased slope of the Tafel-lines. The same effect of К-ions was observed at platinised Pt- and Ni-electrodes. The effect on the anodic polarisation was directly proportional (at constant current density) to the logarithm of the К+ concentration. The behaviour of the cations was explained with adsorption in the diffuse part of the double layer increasing the activation energy of the electrolytic oxygen evolution.

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