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- W4296196381 abstract "Iridium oxide (IrOx)-based materials perform high efficiency and durability for oxygen evolution reaction (OER) in acidic environment. Developing highly efficient OER electrocatalysts with low Ir-loading in acid is still a great challenge. Herein, we fabricated a hollow IrCoOx nanosphere via in-situ electrochemistry reconstruction strategy. The developed hollow Ir0.16Co0.84Ox electrocatalyst with low Ir-loading (51.91 μg cm−2) exhibits 71-fold and 42-fold improvement in OER mass activity and TOF value compared with commercial IrO2 (1032.16 vs 14.44 A gIr−1, 0.754 vs 0.018 s−1) in 0.1M HClO4, respectively. Combining with the analysis of the IrCoOx structure, the electrochemical performance reveals that the superior activity ascribes to the favorable hollow structure, the abundant crystalline/amorphous heterostructure in the IrOx-enriched shell and the atomic heterointerfaces between Co and Ir oxides, which increase the electrochemical active area, accelerate the OER kinetics and lower the charge transfer resistance (2.8 Ω cm2). This work is anticipated to aid the design of novel low Ir-loading electrocatalysts with outstanding catalytic activity for water splitting in acidic environments." @default.
- W4296196381 created "2022-09-18" @default.
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- W4296196381 date "2022-11-01" @default.
- W4296196381 modified "2023-10-17" @default.
- W4296196381 title "In-situ reconstructed hollow iridium-cobalt oxide nanosphere for boosting electrocatalytic oxygen evolution in acid" @default.
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- W4296196381 doi "https://doi.org/10.1016/j.electacta.2022.141199" @default.
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