Plasma treatment as an effective strategy can simultaneously achieve surface modification and heteroatom doping. Here, an N/P-doped NiFeV oxide nanosheet catalyst (N/P-NiFeVO) constructed by Ar/PH₃ plasma treatment is used to drive the oxygen evolution reaction (OER). The introduction of V species leads to the formation of an ultrathin ordered nanostructure and exposure of more active sites. Compared to the 2D NiFeV LDH, the prepared N/P-NiFeVO by plasma treatment possesses multiple-valence Fe, V and Ni species, which regulate the intrinsic electronic structure and enable a superior catalytic activity for the OER in alkaline media. Specifically, the N/P-NiFeVO only require an overpotential of 273 mV to drive the current density of 100 mA cm⁻². What's more, the electrode can maintain a stable current density in a long-term oxygen evolution reaction (∼120 h) under alkaline conditions. This work provides new insight for the rational design of mixed metal oxides for OER electrocatalysts.

中文翻译：

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具有氧空位的 N/P 掺杂 NiFeV 氧化物纳米片作为析氧反应的有效电催化剂

等离子体处理作为一种有效的策略可以同时实现表面改性和杂原子掺杂。在此，通过Ar/PH ₃等离子体处理构建的N/P掺杂的NiFeV氧化物纳米片催化剂（N/P-NiFeVO）用于驱动析氧反应（OER）。 V物质的引入导致超薄有序纳米结构的形成和更多活性位点的暴露。与2D NiFeV LDH相比，通过等离子体处理制备的N/P-NiFeVO具有多价Fe、V和Ni物质，可调节内在电子结构并在碱性介质中对OER具有优异的催化活性。具体而言，N/P-NiFeVO仅需要273 mV的过电势即可驱动100 mA cm ^-2的电流密度。此外，该电极在碱性条件下长期析氧反应（~120 h）中仍能保持稳定的电流密度。这项工作为 OER 电催化剂的混合金属氧化物的合理设计提供了新的见解。