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Study on kinetics of oxygen evolution on lead alloy anodes

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Abstract

A study was carried out on kinetics of oxygen evolution on lead alloy anodes in sulphuric acidic electrolyte. The influence of alloy elements Ca, Ag and Sn on the overpotential of oxygen evolution was investigated. All anodes had been subjected to a pre-polarisation before the measurement of potential-current curves for oxygen evolution. The overpotential of oxygen evolution was found to be decreased when the alloy anode contained Ca and Ag, whereas it remained unchanged when the alloy anode contained Sn. For oxygen evolution on lead alloy anodes the TAFEL equation was valid. The b vulue for Pb and Pb-Ca anodes was approx. 100, for Pb-Ag, Pb-Ag-Ca anodes it was approx. 140. The a value for Pb-Ca, Pb-Ag, Pb-Ag-Ca anodes decreased with the increase of Ca or/and Ag content. The a and b value was not influenced by Sn in the anodes.

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Authors and Affiliations

  1. Institute of Metallurgical Physicochemistry and New Chemical Materials, Central South University of Technology, 410083, Changsha, China

    Chen Wenmi & Guo Bingkun

  2. Institute of Non-ferrous Metallurgy and Purest Materials, Technological University Mining Academy of Freiberg, 09599, Freiberg, Germany

    Hein Klaus

Authors
  1. Chen Wenmi
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  2. Guo Bingkun
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  3. Hein Klaus
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Additional information

Project supported by the Ministry of Economy of Germany

Synopsis of the first author Chen Wenmi, associate professor, born in May 1965, received Ph D degree at the Mining Academy of Freiberg in 1993, major research fields: electrode reaction kinetics, electroplating.

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Chen, W., Guo, B. & Hein, K. Study on kinetics of oxygen evolution on lead alloy anodes. J Cent. South Univ. Technol. 4, 69–72 (1997). https://doi.org/10.1007/s11771-997-0035-y

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  • DOI: https://doi.org/10.1007/s11771-997-0035-y

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