Parametric study on the electrochemical performance and stability of PbO2-coated titanium electrodes for electrowinning applications

In recent years, lead dioxide coatings have received extensive attention as promising anode material for electrochemical processes. In the present study, the electrodeposition of PbO 2 on a Ti substrate from nitrate bath was investigated to serve as the oxygen evolution anode for electrowinning of n...

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Bibliographic Details
Published in:Journal of applied electrochemistry 2023-08, Vol.53 (8), p.1563-1577
Main Authors: Sharifidarabad, Hadi, Zakeri, Alireza, Adeli, Mandana
Format: Article
Language:English
Subjects:
Accelerated life tests
Additives
Anodes
Chemistry
Chemistry and Materials Science
Coatings
Copper
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrochemistry
Electrode materials
Electrodes
Electrowinning
Evolution
Industrial Chemistry/Chemical Engineering
Interlayers
Lead oxides
Nonferrous metals
Oxygen
Parametric statistics
Physical Chemistry
Research Article
Sodium dodecyl sulfate
Substrates
Titanium
Voltammetry
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Summary:In recent years, lead dioxide coatings have received extensive attention as promising anode material for electrochemical processes. In the present study, the electrodeposition of PbO 2 on a Ti substrate from nitrate bath was investigated to serve as the oxygen evolution anode for electrowinning of nonferrous metals. The effect of predeposition of the α-PbO 2 interlayer between the Ti substrate and the β-PbO 2 top layer, as well as the use of additives such as copper ions and sodium dodecyl sulfate in the electrolyte was studied. The coatings were characterized using regular and grazing-incidence X-ray diffractometry, and scanning electron microscopy (SEM) techniques. The electrochemical properties of the prepared PbO 2 -coated Ti electrodes were evaluated and electrocatalytic activity was quantified using i max from cyclic voltammetry, in combination with linear sweep voltammetry, electrochemical impedance spectroscopy, and accelerated life test. It was found out that the Ti/α-PbO 2 /β-PbO 2 electrode produced in a nitrate solution containing NaF, Cu(NO 3 ) 2 , and SDS exhibited the most favorable electrochemical performance. Under these conditions, a prominent increase in i max (17 times of that for the sample with no additives and interlayer) and a notable decrease in oxygen evolution potential from 2.05 to 1.85 V were achieved. Graphical abstract
ISSN:0021-891X
1572-8838
DOI:10.1007/s10800-023-01867-2