The electrocatalytic water splitting is still seriously hindered by the sluggish reaction kinetics, large overpotential, and high cost of oxygen evolution reaction (OER) electrocatalyst. To address such issues, herein, for the first time, three-dimensional porous Ni/Ni₃Fe anchored boron-doped carbon nanotubes nanochain frameworks (Ni/Ni₃Fe/B-CNT), constructed by ultrasmall Ni/Ni₃Fe nanoparticles embedded in highly conductive B-doped CNT chains, are synthesized via a facile self-assembly hydrolysis method and corresponding growth mechanism is revealed. The low-cost Ni/Ni₃Fe/B-CNT hybrid delivers excellent OER performance outperforming that of well-established benchmark electrocatalysts (RuO₂): it requires only 265 mV to obtain a large current density of 10 mA cm⁻² (mass load ~ 0.28 mg cm⁻²); it shows a small Tafel slope of 62.9 mV dec⁻¹ and excellent long-term stability even after 40 h. The outstanding OER performance of Ni/Ni₃Fe/B-CNT is mainly attributed to its unique porous nanoarchitecture with abundant active sites and the synergistic effect between the ultrathin Ni/Ni₃Fe nanoparticles and highly conductive B-doped CNT skeleton; these merits facilitate the electron/ion transfer and oxygen bubble release thus significantly improve its OER activity. This work presents a well-designed nanoarchitecture design and facile fabrication strategy to obtain nonprecious transition metal-based OER electrocatalysts with excellent efficiency and long-term stability.

反应动力学缓慢，过大的电势和氧释放反应（OER）电催化剂的高成本仍然严重阻碍了电催化水的裂解。为了解决这些问题，本文中，首次使用由超小型Ni / Ni ₃ Fe纳米颗粒构建的三维多孔Ni / Ni ₃ Fe锚定的掺硼碳纳米管纳米链骨架（Ni / Ni ₃ Fe / B-CNT）。通过简便的自组装水解方法合成了嵌入高导电性B掺杂CNT链中的分子，并揭示了相应的生长机理。低成本的Ni / Ni ₃ Fe / B-CNT杂化物具有出色的OER性能，优于成熟的基准电催化剂（RuO ₂）：仅需要265 mV即可获得10 mA cm ^-2的大电流密度（质量负载〜0.28 mg cm ^-2）；它显示出62.9 mV dec ^-1的小Tafel斜率，甚至在40 h后仍具有出色的长期稳定性。Ni / Ni ₃ Fe / B-CNT杰出的OER性能主要归因于其独特的具有丰富活性位点的多孔纳米结构以及超薄Ni / Ni ₃之间的协同作用铁纳米粒子和高导电性的B掺杂CNT骨架; 这些优点有利于电子/离子转移和氧气气泡的释放，从而显着提高其OER活性。这项工作提出了一种精心设计的纳米体系结构设计和便捷的制造策略，以获得具有出色效率和长期稳定性的非贵金属过渡金属基OER电催化剂。