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Titolo:
ANALYSIS OF THE OXIDATION PROCESS OF ANODIC PB(II) FILMS ON LEAD IN SULFURIC-ACID-SOLUTION
Autore:
CAI WB; LIU HT; ZHOU WF;
Indirizzi:
XIAMEN UNIV,DEPT CHEM,STATE KEY LAB PHYS CHEM SOLID SURFACES XIAMEN 361005 PEOPLES R CHINA FUDAN UNIV,DEPT CHEM SHANGHAI 200433 PEOPLES R CHINA
Titolo Testata:
Journal of power sources
fascicolo: 1, volume: 63, anno: 1996,
pagine: 131 - 135
SICI:
0378-7753(1996)63:1<131:AOTOPO>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
REDUCTION PROCESSES; ANTIMONIAL LEAD; PBO FILM; H2SO4; KINETICS; ELECTROREDUCTION; POTENTIALS; ELECTRODE; CORROSION; ALLOYS;
Keywords:
LEAD SULFURIC ACID SYSTEM; ELECTROOXIDATION; ANODIC LEAD(II) FILMS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
W.B. Cai et al., "ANALYSIS OF THE OXIDATION PROCESS OF ANODIC PB(II) FILMS ON LEAD IN SULFURIC-ACID-SOLUTION", Journal of power sources, 63(1), 1996, pp. 131-135

Abstract

Electro-oxidation of the anodic Pb(II) film formed on lead at 0.6 V in H2SO4 solution for 20 min is analysed using non-linear regression, chrono-amperometry and linear sweep voltammetry. It is shown that the overall current transient of the oxidation at 1.4 V can be separated into the following contributions: (i) oxidation of the Pb(II)-containingphases into PbO2 which involves mainly an instantaneous nucleation and two-dimensional growth mechanism under charge-transfer control (2DIC); (ii) oxidation of the lead substrate into PbO under the diffusion control of oxygen ions, and (iii) evolution of oxygen on the electrode. The plumbous phases that participate in the oxidation process includean inner layer of (PbO+PbO . PbSO4) together with an adjacent part ofan outer layer of PbSO4. Several electrochemical quantities of significance with respect to this oxidation process have been calculated, such as the thickness of the PbO2 formed, the degree of oxidation of thePb(II)-containing phases, as well as the diffusion coefficient of O2-in the concurring oxidation process of Pb to PbO.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 10:40:00