Journal of Electroanalytical Chemistry, Vol.379, No.1-2, 423-426, 1994
Studies of the Effect of Bismuth on the Anodic-Oxidation of Lead in Sulfuric-Acid-Solution by Photocurrent Spectroscopy
The anodic film formed on Pb-9 at.% Bi alloy at 0.90 V (vs. Hg/Hg2SO4) in 4.5 M H2SO4 solution (25 degrees C) was studied using photocurrent spectroscopy. The presence of bismuth does not change the band gap energy (2.0 eV) or the flat-band potential (-0.28 V vs. Hg/Hg2SO4), but reduces significantly the photocurrent of t-PbO in the anodic film. This may be due to the presence of Bi2O3 crystallites in the t-PbO film.