Abstract
This study elucidated electrochemical behaviors of an IrO2-Ta2O5/Ti anode and pre-deposited PbO2 layers of two types on IrO2-Ta2O5/Ti anodes in H2SO4 solutions. The onset potential for the reduction of β-PbO2 of a pre-deposited PbO2 layer prepared from acidic solutions was more positive than the oxygen evolution potential on the IrO2-Ta2O5/Ti anode. Formation of a non-conductive PbSO4 film on IrO2- Ta2O5/Ti anodes in copper foil production can be attributed to the formation of a local cell consisting of a PbO2 cathode and an IrO2-Ta2O5 anode during an open-circuit condition.
