High‐efficiency oxygen evolution reaction (OER) electrocatalysts based on transition metal materials are one of the most promising alternatives, but their activity and durability are still far from desirable. Here, we report trimetallic N‐doped carbon nanotubes with rapid electron transport and rapid diffusion of the electrolyte that can significantly enhance the OER. The introduction of a third metal can adjust the electronic structure, thereby causing favorable intermediate adsorption on the catalysts. The optimized catalyst CoFeNi@CNTs exhibits a low overpotential of 287 mV at 10 mA cm⁻² and a small Tafel slope of 32 mV dec⁻¹, which are obviously superior to the precious catalyst IrO₂ and most previously reported catalysts. The CoFeNi@CNTs also exhibit excellent OER stability with small current density decay after 12 h. The outstanding OER activity is ascribed to the unique carbon nanotube structure and strong synergy between three metals.

中文翻译：

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三金属纳米粒子被封装在像竹子一样的N掺杂碳纳米管中，作为高效析氧电催化的稳健催化剂

基于过渡金属材料的高效氧析出反应（OER）电催化剂是最有前途的替代方法之一，但它们的活性和耐久性仍然远远不够。在这里，我们报道了三金属N掺杂碳纳米管具有快速的电子传输和电解质的快速扩散，可以显着提高OER。引入第三种金属可以调节电子结构，从而在催化剂上引起有利的中间吸附。优化后的催化剂CoFeNi @ CNTs在10 mA cm ^-2下表现出低的287 mV过电势和32 mV dec ^-1的小Tafel斜率，明显优于贵金属IrO ₂和大多数以前报道的催化剂。CoFeNi @ CNTs还表现出出色的OER稳定性，在12小时后电流密度衰减小。杰出的OER活性归因于独特的碳纳米管结构和三种金属之间的强大协同作用。