Engineering high-performance and low-cost bifunctional catalysts for H₂ (hydrogen evolution reaction [HER]) and O₂ (oxygen evolution reaction [OER]) evolution under industrial electrocatalytic conditions remains challenging. Here, for the first time, we use the stronger electronegativity of a rare-Earth yttrium ion (Y³⁺) to induce in situ NiCo-layered double-hydroxide nanosheets from NiCo foam (NCF) treated by a dielectric barrier discharge plasma NCF (PNCF), and then obtain nitrogen-doped YNiCo phosphide (N-YNiCoP/PNCF) after the phosphating process using radiofrequency plasma in nitrogen. The obtained N-YNiCoP/PNCF has a large specific surface area, rich heterointerfaces, and an optimized electronic structure, inducing high electrocatalytic activity in HER (331 mV vs. 2000 mA cm⁻²) and OER (464 mV vs. 2000 mA cm⁻²) reactions in 1 M KOH electrolyte. X-ray absorption spectroscopy and density functional theory quantum chemistry calculations reveal that the coordination number of CoNi decreased with the incorporation of Y atoms, which induce much shorter bonds of Ni and Co ions and promote long-term stability of N-YNiCoP in HER and OER under the simulated industrial conditions. Meanwhile, the CoN-YP₅ heterointerface formed by plasma N-doping is the active center for overall water splitting. This work expands the applications of rare-Earth elements in engineering bifunctional electrocatalysts and provides a new avenue for designing high-performance transition-metal-based catalysts in the renewable energy field.

中文翻译：

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用于高效水电解的钇和氮掺杂镍钴磷化物纳米片

_{在工业电催化条件下设计用于析氢}反应[HER]和析氧反应[OER]的高性能和低成本双功能催化剂仍然具_有挑战性。在这里，我们首次利用稀土钇离子 (Y ³⁺ ) 更强的电负性，从经过介质阻挡放电等离子体 NCF 处理的 NiCo 泡沫 (NCF) 中原位诱导出 NiCo 层状双氢氧化物纳米片 (NCF)。 PNCF），然后在氮气中使用射频等离子体进行磷化处理后得到氮掺杂的YNiCo磷化物（N-YNiCoP/PNCF）。所得的N-YNiCoP/PNCF具有较大的比表面积、丰富的异质界面和优化的电子结构，在HER（331 mV vs. 2000 mA cm ^-2）和OER（464 mV vs. 2000 mA cm -2 ）和OER（464 mV vs. 2000 mA cm -2 ）中具有高电催化活性。 ^-2 ) 1 M KOH 电解质中的反应。X射线吸收光谱和密度泛函理论量子化学计算表明，CoNi的配位数随着Y原子的掺入而减少，这导致Ni和Co离子的键更短，从而促进N-YNiCoP在HER和模拟工业条件下的开放教育资源。同时，等离子体N掺杂形成的CoN-YP ₅异质界面是整个水分解的活性中心。这项工作拓展了稀土元素在工程双功能电催化剂中的应用，并为可再生能源领域设计高性能过渡金属基催化剂提供了新途径。