OXYGEN DEPOLARIZATION AT A LEAD ANODE ELECTROCHEMICALLY COATED WITH RHODIUM OXIDE OR PALLADIUM OXIDE


TIMUR S., HEIN K.

METALL, cilt.49, ss.496-500, 1995 (SCI İndekslerine Giren Dergi) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 49
  • Basım Tarihi: 1995
  • Dergi Adı: METALL
  • Sayfa Sayıları: ss.496-500

Özet

This paper deals with the electrochemical plating of lead anodes with mixed oxides and their stability in aqueous H2SO4 electrolytes. investigative work has been carried out with Ph-Ph and Pb-Pd oxides. Temperature, ion-concentration and acidity of the electrolyte were varied to determine the effects on the deposition of mixed oxides and their electrochemical performance in aqueous sulfuric-acid solutions. The stability of anodically prepared Ph-Me-layers was rested with constant current and current polarisation methodes and compared with pure lead anodes. Optimal results were obtained with Pb-Rh oxides, which develope a more (220 mV) electronegative oxygen-overpotential and are stable in aqueous sulfuric-acid electrolytes. Ph-Pd mixed oxides don't show depolarisation effects and are not stable in the tested electrolytes.