Recently, surface reconstruction derived from Ir-based derivatives could achieve satisfactory oxygen evolution performance. Herein, ultra-long nanowire hollandite structured RbIrO was synthesized and a nano-amorphous layer with a thickness of ∼1.5 nm was achieved by interfacial oxidation treatment. The prepared catalyst exhibits outstanding water oxidation activity with an oxygen evolution reaction (OER) current density of 10 mA cm at 330 mV for robust continuous operation in acidic media. Through the spectroscopic and density functional theory (DFT) theoretical calculations, we demonstrate that the nano-amorphous layers induced by interfacial oxidation on the one-dimensional (1D)-nanowire surface have enhanced O-2p centers and increased Ir-O hybridization compared to the bulk RbIrO phase, which essentially balances the adsorption energy of the intermediates. Effectively incorporating surface reconstruction behavior could significantly improve catalyst activity. This work effectively combines 1D Ir-based materials and surface reconstruction, which provides a strategy for the subsequent full utilization of Ir-based materials applied on OER process.

中文翻译：

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界面氧化诱导非晶/结晶 1D 锰铝石 Rb0.17IrO2 用于高效析氧反应

最近，基于铱的衍生物的表面重构可以实现令人满意的析氧性能。本文合成了超长纳米线菱铁矿结构的 RbIrO，并通过界面氧化处理获得了厚度约为 1.5 nm 的纳米非晶层。所制备的催化剂表现出出色的水氧化活性，330 mV 下的析氧反应 (OER) 电流密度为 10 mA cm，可在酸性介质中稳定连续运行。通过光谱和密度泛函理论（DFT）理论计算，我们证明一维（1D）纳米线表面上的界面氧化诱导的纳米非晶层具有增强的O-2p中心和增强的Ir-O杂化。 RbIrO 相，基本上平衡了中间体的吸附能。有效结合表面重构行为可以显着提高催化剂活性。该工作有效地将一维铱基材料与表面重构结合起来，为后续铱基材料在OER过程中的充分利用提供了策略。