ISSN:
1572-8838
Keywords:
PbO2 films
;
Pb-As alloy,
;
Pb-Bi alloy
;
reduction behaviour
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Electrical Engineering, Measurement and Control Technology
Notes:
Abstract The reduction behaviour of the anodic PbO2 films on Pb-3at% As and Pb-3at% Bi has been investigated using in situ photocurrent spectroscopy, impedance methods, chronoamperometry and linear sweep voltammetry. The experimental results show that most of the PbO2 in the film can be converted to PbSO4 in about 2s at 1.0V (vs Hg/Hg2SO4). Alloying with both As and Bi slightly retards this reduction process. The remaining PbO2 can only be reduced at a lower potential, (e.g., 0.60 V vs Hg/Hg2SO4) to t-PbO. Alloying with As slows down this second reduction process, while alloying with Bi accelerates it markedly.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1018479819537
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