The oxygen evolution reaction (OER) on the anode side is one of the bottlenecks for electrochemical water splitting, and the search for cost‐effective and efficient catalysts for OER is highly pursued. Herein, through calcination and nitridation treatment of the Cu−Co based bimetallic metal‐organic framework precursor, nitrogen doped CuCo₂O₄/nitrogen‐doped carbon (N−CuCo₂O₄@N−C) are successfully synthesized. X‐ray photoelectron spectroscopy measurements reveal the evident change of electronic state after doping N atoms into CuCo₂O₄@N−C. When used as an OER electrocatalyst, N−CuCo₂O₄@N−C catalysts offer an overpotential of only 260 mV to reach 10 mA cm⁻², which is comparable to commercial RuO₂ catalyst. The N−CuCo₂O₄@N−C sample possesses a lower Tafel slope than pristine CuCo₂O₄@N−C sample. Moreover, a chronoamperometric study reveals that N−CuCo₂O₄@N−C displays excellent stability for at least 28 h. This work provides a promising heteroatom doping strategy to fabricate high‐performance OER electrocatalysts for water splitting.

中文翻译：

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氮掺杂二元尖晶石CuCo2O4 / C纳米复合材料：氧释放反应的高效电催化剂

阳极侧的析氧反应（OER）是电化学水分解的瓶颈之一，因此人们一直在寻求经济高效的OER催化剂。在本文中，通过对Cu-Co基双金属金属有机骨架前体进行煅烧和氮化处理，成功地合成了氮掺杂的CuCo ₂ O ₄ /氮掺杂的碳（N-CuCo ₂ O ₄ @NC ）。X射线光电子能谱测量揭示了在将N原子掺杂到CuCo ₂ O ₄ @NC后电子态的明显变化。当用作OER电催化剂时，N-CuCo ₂ O ₄@NC催化剂提供的仅超过260 mV的超电势即可达到10 mA cm ^-2，可与商业RuO ₂催化剂相比。N-CuCo ₂ O ₄ @NC样品的Tafel斜率比原始CuCo ₂ O ₄ @NC样品的低。此外，计时电流法研究表明，N-CuCo ₂ O ₄ @ N-C在至少28小时内显示出出色的稳定性。这项工作提供了一种有前途的杂原子掺杂策略，以制备用于水分解的高性能OER电催化剂。