The sluggish oxygen evolution reaction (OER) through water electrolysis is still challenging. Herein, a facile approach to fabricate highly efficient nanostructured FeNi₃ incorporated on carbon doped with multiple nonmetal elements (FeNi₃/M‐C) was prepared by annealing an in situ polymerized metal complex from economical precursors. The temperature dependence of the structure and the catalytic performance for the OER was probed. The best pyrolysis temperature was 800 °C, at which the fabricated material exhibited the highest catalytic performance for the OER. Specifically, an overpotential as low as 246 mV (no IR correction) afforded 10 mA cm⁻² with a low Tafel slope of 40 mV dec⁻¹, exceeding that of the best noble‐metal catalyst IrO₂ and other similar Fe–Ni alloys. High catalytic efficiency and anticorrosion ability towards the OER were displayed in terms of high specific surface area, rapid kinetics, high stability, and specific activity. The excellent performance was correlated to the structure and the modest graphitization degree of carbon and an appropriate ratio between graphitic and pyridinic N atoms and the synergistic effect between the Fe–Ni alloy active sites and the conducting carbon doped with multiple nonmetal elements. Moreover, as a powder catalyst, it could be applied in a real polymer electrolyte membrane electrolyzer. These results are helpful for understanding the improved catalytic activity and the promotion of the catalytic efficiency of the Fe–Ni alloy materials for the OER.

中文翻译：

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掺有多种非金属元素碳的纳米结构FeNi3用于氧释放反应

通过水电解的缓慢的放氧反应（OER）仍然具有挑战性。在本文中，通过对经济前体的原位聚合金属配合物进行退火，制备了一种简便的方法来制备掺入掺杂有多种非金属元素（FeNi ₃ / MC）的碳上的高效纳米结构FeNi ₃。探索了结构的温度依赖性和OER的催化性能。最佳热解温度为800°C，在该温度下，所制备的材料对OER表现出最高的催化性能。具体来说，低至246 mV的过电势（无IR校正）可提供10 mA cm ^-2的Tafel斜率，低至40 mV dec ^-1，超过了最佳贵金属催化剂IrO的斜率。₂和其他类似的Fe–Ni合金。在高比表面积，快速动力学，高稳定性和比活性方面显示出对OER的高催化效率和抗腐蚀能力。优异的性能与碳的结构和适度的石墨化程度以及石墨和吡啶N原子之间的适当比例以及Fe-Ni合金活性位与掺杂多种非金属元素的导电碳之间的协同效应有关。此外，作为粉末催化剂，可以将其应用于实际的聚合物电解质膜电解槽中。这些结果有助于理解Fe-Ni合金材料对OER的改善的催化活性和催化效率的提高。