Electrochemical behavior of rolled Pb-0.8%Ag anodes in an acidic zinc sulfate electrolyte solution containing Cl- ions

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	Electrochemical behavior of rolled Pb-0.8%Ag anodes in an acidic zinc sulfate electrolyte solution containing Cl- ions
	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
刊名	HYDROMETALLURGY
	2014-08-01
卷号	147 期号:AUG 页码:148-156
关键词	Pb-0.8%Ag rolled-alloy anode Electrochemical behavior Anodic oxide layer Zinc electrowinning Cl- ions
ISSN号	0304-386X
其他题名	Hydrometallurgy
中文摘要	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.
英文摘要	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.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Metallurgy & Metallurgical Engineering
研究领域[WOS]	Metallurgy & Metallurgical Engineering
关键词[WOS]	OBTAINING PLASTIC TREATMENT ; LEAD DIOXIDE ELECTRODE ; PB-AG ANODES ; CA ALLOYS ; BATTERY ; PERFORMANCE ; EXTRACTION ; CAPACITY ; TAFEL ; EIS
收录类别	SCI
原文出处	://WOS:000340333100021
语种	英语
WOS记录号	WOS:000340333100021
公开日期	2014-09-30
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/11584]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.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
推荐引用方式 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.