Durability of a thermally decomposed iridium(IV) oxide–tantalum(V) oxide coated titanium anode in aqueous ammonium citrate
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Jianchao Xue
and
Bo Jia
Abstract
Ti/IrO2–Ta2O5 coated anodes were widely used in the production process of aluminum foil that is vital raw material for high-performance electronic components, exhibits excellent service durability in sulfuric acid medium, but its lifespan is significantly reduced when used in ammonium citrate neutral electrolyte. The evolution of constant current accelerated lifetime process of Ti/IrO2–Ta2O5 anodes in 100 g/L ammonium citrate aqueous solution was systematically studied. The corrosion mechanism was revealed by physical characterization and electrochemical measurements. During electrolysis, IrO2 was gradually dissolved due to the interaction of IrO2 coating and the electrolyte. Consequently, the corrosion mechanism of the compact IrO2–Ta2O5 coating is the effect of substantial dissolution of the active components.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interests: The authors state no conflict of interest.
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Research funding: This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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Data availability: Not applicable.
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