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- W4295958023 abstract "The oxygen evolution reaction (OER) is regarded as the efficiency-limiting step because it suffers from a kinetically sluggish four-electron process in water splitting. The intrinsic catalytic activity could be improved by adjusting the electronic structure of the catalyst through interface modification engineering. In this work, Fe ion-chelated tannic acid was coated on Ni-WOx nanowires to form [email protected]x hierarchical structure by the interfacial coordination assembly process. The hierarchical structure has abundant active sites and good electrical conductivity, which exhibits extraordinary OER performance in alkaline electrolytes. Specifically, the [email protected]x catalyst requires low over-potentials of 240 and 260 mV at 20 mA cm−2 and 50 mA cm−2, respectively. X-ray photoelectron spectroscopy results confirm that the electronic structure of [email protected]x is more beneficial to OER than Ni-WOx due to the introduction of the TA-Fe nano-sheets overlayer on the surface of Ni-WOx nanowires. Furthermore, the ultraviolet photoelectron spectroscopy results confirm that the [email protected]x hierarchical structure has an upward-moving Fermi energy and a smaller ionization potential, providing a more electron-rich environment. It is demonstrated that this simple interfacial coordination assembly coating strategy is an effective way to reasonably adjust the surface properties of metal oxides for promising applications." @default.
- W4295958023 created "2022-09-16" @default.
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- W4295958023 date "2022-12-01" @default.
- W4295958023 modified "2023-10-18" @default.
- W4295958023 title "Fe ion-chelated tannic acid layer coordinates the electronic structure of Ni-WOx to enhance oxygen evolution performance" @default.
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- W4295958023 doi "https://doi.org/10.1016/j.jallcom.2022.167225" @default.
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