Kinetics of oxidation processes on lead electrode in H{sub 2}SO{sub 4}. 2: The growth of the PbSO{sub 4} and PbO layer

Journal Article · Sun Oct 01 04:00:00 EDT 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2049990· OSTI ID:131771

Guo, Y ^[1]

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1. Shandong Univ., Jinan (China). Dept. of Chemistry

The growth kinetics of both PbSO{sub 4} and PbO layers has been studied further. The growth rate of the PbSO{sub 4} layer depends on the migration of the SO{sub 4}{sup 2{minus}} ion through the micropores while that of the PbO layer depends on the migration of the Pb{sup 2+} and OH{sup {minus}} ion in the PbO layer and the H{sup +} ion in the PbSO{sub 4} layer. The PbSO{sub 4} and PbO layers grow at the PbO{center_dot} decrease linearly with the distance from the PbSO{sub 4}/PbSO{sub 4} and metal/PbO interfaces, respectively. In the PbSO{sub 4} layer, the concentrations of the SO{sub 4}{sup 2{minus}} and H{sup +} ions decrease linearly with the distance from the PbSO{sub 4}/bulk solution interface and the largest potential drop appears at the PbO{center_dot}PbSO{sub 4}/PbSO{sub 4} interface. Yet the concentrations of the Pb{sup 2+} and OH{sup {minus}} ions remain unchanged and the diffusion potential drops linearly in the PbO layer.

• Sponsoring Organization: USDOE
• OSTI ID: 131771
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 10 Vol. 142; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
COATINGS
CRYSTAL GROWTH
LEAD
LEAD OXIDES
LEAD SULFATES
LEAD-ACID BATTERIES
OXIDATION
PASSIVATION
PORE STRUCTURE
REDOX REACTIONS
SULFURIC ACID