Abstract
This work investigated the effects of current density and deposition time on the properties of electrodeposited PbO2. The PbO2 preparation was conducted on Ti/SnO2–Sb substrates by galvanostatic anodic deposition in a newly proposed methanesulfonate electrolytic solution. Phase constituents and microstructures of the deposited PbO2 coatings were characterized. Increasing current density in the range ≤ 100 mA cm− 2 leads to the formation of highly textured coatings with an increased content of α-PbO2 phase. Concurrently, a high current density favors a compact and flat surface morphology. The study of deposition time indicates a change of crystallite growth manner from an initially random growth to a later-stage preferred growth along distinct orientations. The change of crystallite growth is corroborated by the cross-sectional microstructures of the PbO2 deposits. The microstructural transition occurs only in the initial deposition stage. After a brief period, prolonged electrodeposition barely changes the surface morphology of PbO2 coatings.
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Acknowledgements
Zhen He acknowledges the support from New Zealand Ministry of Foreign Affairs and Trade for offering a doctoral scholarship for his study at the University of Auckland.
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He, Z., Hayat, M.D., Yuan, X. et al. Effects of deposition time and current density on PbO2 electrosynthesis from methanesulfonate electrolyte. J Appl Electrochem 48, 783–791 (2018). https://doi.org/10.1007/s10800-018-1194-2
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DOI: https://doi.org/10.1007/s10800-018-1194-2