Kinetics of oxidation processes on lead electrode in H{sub 2}SO{sub 4}. 3: To study the growth of the PbO layer by linear sweep voltammetry

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1836612· OSTI ID:251047

Guo, Y; Hua, S; Xu, H; Yang, Y ^[1]

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

The growth kinetics of the PbO layer has been further studied by linear sweep voltammetry. It is found that the PbO charge passed at a constant potential is proportional to the square root of the polarization time. During the growth of the PbO layer, two different mass transfer processes appear in different potential ranges. Above 400 mV, its growth rate is controlled by the migration of the divalent O{sup 2+} vacancies passing through the PbO layer; while below 400 mV, it may depend on the migration of univalent ions, i.e., the OH{sup {minus}} ion in the PbO layer and the H{sup +} ion in the PbSO{sub 4} layer. The effects of the sweep rate are also discussed.

• Sponsoring Organization: USDOE
• OSTI ID: 251047
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 4 Vol. 143; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
40 CHEMISTRY
CHEMICAL REACTION KINETICS
CRYSTAL GROWTH
ELECTROCHEMISTRY
LEAD
LEAD OXIDES
LEAD-ACID BATTERIES
OXIDATION
SULFURIC ACID
VOLTAMETRY