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- W4200560331 abstract "Nowadays, Ti is the well-chosen anode substrate material for proton exchange membrane electrolyzer cells (PEMECs) and modifications of the substrate surfaces are essential for the fabrication of highly efficient electrodes. Herein, we introduce the morphology engineering of Ir/Ti electrodes with different acid treatments of hydrochloric acid (HCl) and oxalic acid (OA), and the comparative benefits of these two acid treatment methods are studied from the aspects of their impacts on the morphology, interfacial contact resistance (ICR), and oxygen evolution reaction (OER) performances of resultant electrodes. Notably, compared to the flat surface from OA treatment, Ti substrates with the pillar structure could be successfully achieved via HCl etching. The HCl and the oxalic acid (OA) treatments would reduce the interfacial contact resistance (ICR) to 15.2% and 5.5% of the pristine Ti substrate at 1.38 MPa, respectively. By iridium electrodeposition on Ti substrates, Ir/Ti electrodes with different catalyst loadings are fabricated. With similar low-loadings of about 0.05 mgIr cm−2, an Ir/Ti electrode with HCl treated substrate exhibits a lower overpotential of ∼283 mV at 10 mA cm−2 current density than 305 mV from OA treatment, due to the boosted reaction areas from HCl treatment." @default.
- W4200560331 created "2021-12-31" @default.
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- W4200560331 date "2022-02-01" @default.
- W4200560331 modified "2023-10-09" @default.
- W4200560331 title "Morphology engineering of iridium electrodes via modifying titanium substrates with controllable pillar structures for highly efficient oxygen evolution reaction" @default.
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- W4200560331 doi "https://doi.org/10.1016/j.electacta.2021.139797" @default.
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