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Electrochemical behavior of rolled Pb-0.8%Ag anodes in an acidic zinc sulfate electrolyte solution containing Cl- ions
Alternative TitleHydrometallurgy
Yang, H. T.1; Guo, Z. C.2,3; Chen, B. M.2; Liu, H. R.4; Zhang, Y. C.2; Huang, H.2; Li, X. L.3; Fu, R. C.5; Xu, R. D.2,6
2014-08-01
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume147Issue:AUGPages:148-156
AbstractIn this study, the oxygen evolution kinetics and oxide layer properties of Pb-0.8%Ag rolled-alloy anodes were investigated during 15 d of galvanostatic electrolysis in an acidic zinc sulfate electrolyte solution containing 600 mg.L-1 Cl-1 ions. Cyclic voltammetry, quasistationary polarization, and electrochemical impedance spectroscopy were used to investigate the anode process. The microscopic morphology and phase composition of the anodic oxide layers were observed by scanning electron microscopy and X-ray diffraction, respectively. The observable variations in the electrocatalytic activity and reaction kinetics of the anodes during electrolysis indicate the formation and stabilization of the anodic oxide layer. With prolonged electrolysis, the oxygen evolution overpotential in the anodes mainly exhibited a decreasing trend, which is contrary to the trend of the electrode surface exchange current density. This depolarization may have been caused by the increasing roughness of the anodic surface and the catalytic effects of alpha-PbO2 and beta-PbO2. As electrolysis continued, the cathodic peak (alpha-PbO2 -> PbSO4) mainly showed an increasing trend and gradually moved toward the negative direction. After 15 days of electrolysis, the oxide layers exhibited a severely corrosive microstructure with plenty of cavities and etch pits. The uniform, well-defined crystal grains and regularity were not appeared. The phase composition of the anodic oxide layer was formed after 6 d of electrolysis. alpha-PbO2 proved to be the main peak and showed preferential growth orientations along the (111) planes of the anodic oxide layer. (C) 2014 Elsevier B.V. All rights reserved.; In this study, the oxygen evolution kinetics and oxide layer properties of Pb-0.8%Ag rolled-alloy anodes were investigated during 15 d of galvanostatic electrolysis in an acidic zinc sulfate electrolyte solution containing 600 mg.L-1 Cl-1 ions. Cyclic voltammetry, quasistationary polarization, and electrochemical impedance spectroscopy were used to investigate the anode process. The microscopic morphology and phase composition of the anodic oxide layers were observed by scanning electron microscopy and X-ray diffraction, respectively. The observable variations in the electrocatalytic activity and reaction kinetics of the anodes during electrolysis indicate the formation and stabilization of the anodic oxide layer. With prolonged electrolysis, the oxygen evolution overpotential in the anodes mainly exhibited a decreasing trend, which is contrary to the trend of the electrode surface exchange current density. This depolarization may have been caused by the increasing roughness of the anodic surface and the catalytic effects of alpha-PbO2 and beta-PbO2. As electrolysis continued, the cathodic peak (alpha-PbO2 -> PbSO4) mainly showed an increasing trend and gradually moved toward the negative direction. After 15 days of electrolysis, the oxide layers exhibited a severely corrosive microstructure with plenty of cavities and etch pits. The uniform, well-defined crystal grains and regularity were not appeared. The phase composition of the anodic oxide layer was formed after 6 d of electrolysis. alpha-PbO2 proved to be the main peak and showed preferential growth orientations along the (111) planes of the anodic oxide layer. (C) 2014 Elsevier B.V. All rights reserved.
KeywordPb-0.8%ag Rolled-alloy Anode Electrochemical Behavior Anodic Oxide Layer Zinc Electrowinning Cl- Ions
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.hydromet.2014.05.004
URL查看原文
Indexed BySCI
Language英语
WOS KeywordOBTAINING PLASTIC TREATMENT ; LEAD DIOXIDE ELECTRODE ; PB-AG ANODES ; CA ALLOYS ; BATTERY ; PERFORMANCE ; EXTRACTION ; CAPACITY ; TAFEL ; EIS
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000340333100021
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11584
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China
3.Kunming Hendera Sci & Technol Co Ltd, Kunming 650106, Peoples R China
4.Kunming Univ Sci & Technol, Fac Land Resource Engn, Kunming 650093, Peoples R China
5.Kunming Univ Sci & Technol, Fac Sci, Kunming 650093, Peoples R China
6.Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
Recommended Citation
GB/T 7714
Yang, H. T.,Guo, Z. C.,Chen, B. M.,et al. Electrochemical behavior of rolled Pb-0.8%Ag anodes in an acidic zinc sulfate electrolyte solution containing Cl- ions[J]. HYDROMETALLURGY,2014,147(AUG):148-156.
APA Yang, H. T..,Guo, Z. C..,Chen, B. M..,Liu, H. R..,Zhang, Y. C..,...&Xu, R. D..(2014).Electrochemical behavior of rolled Pb-0.8%Ag anodes in an acidic zinc sulfate electrolyte solution containing Cl- ions.HYDROMETALLURGY,147(AUG),148-156.
MLA Yang, H. T.,et al."Electrochemical behavior of rolled Pb-0.8%Ag anodes in an acidic zinc sulfate electrolyte solution containing Cl- ions".HYDROMETALLURGY 147.AUG(2014):148-156.
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