In this work, we propose a convenient strategy to manipulate anion intercalation into layered double hydroxide. The obtained NiFe LDH-Cl⁻ electrode shows outstanding OER performance with both low overpotentials and high stability in alkaline seawater at high current density. Ultra-low overpotentials of 255 mV and 350 mV are required in 1 M KOH and alkaline seawater at a current density of 200 mA cm⁻². In addition, NiFe LDH-Cl⁻ can stably operate at 200 mA cm⁻² for 100 h. In situ Raman studies reveal that the active γ-NiOOH is generated on NiFe LDH-Cl⁻ at a low potential by surface reconstruction, and Cl⁻ intercalation helps optimize the peak area ratio of E_g and A_1g, which can be favorable for the alkaline seawater OER.

中文翻译：

---

控制阴离子嵌入层状双氢氧化物以实现高电流密度下的碱性海水氧化


在这项工作中，我们提出了一种方便的策略来操纵阴离子嵌入层状双氢氧化物。所得NiFe LDH- ^Cl−电极在高电流密度的碱性海水中表现出优异的OER性能，具有低过电位和高稳定性。在电流密度为200 mA cm ^-2的1 M KOH和碱性海水中需要255 mV和350 mV的超低过电势。此外，NiFe LDH-Cl ^-可以在200 mA cm ^-2下稳定工作100小时。原位拉曼研究表明，通过表面重构，在低电势下，NiFe LDH-Cl ^-上生成了活性γ-NiOOH，并且Cl ^-插层有助于优化E _g和A _1g的峰面积比，这有利于碱性海水OER。