Developing highly efficient electrocatalysts for oxygen evolution is vital for renewable and sustainable energy production and storage. Herein, nitrogen‐doped carbon encapsulated CoOx‐MoC heterostructures are reported for the first time as high performance oxygen evolution electrocatalysts. The composition can be tuned by the addition of a Mo source to form a nanowire‐assembled hierarchically porous microstructure, which can enlarge the specific surface area, thus exposing more active sites, facilitating mass transport and charge transfer. Moreover, it is demonstrated that the formation of CoOx‐MoC heterostructures and the resulting synergistic effect between MoC and Co facilitate the reaction kinetics, leading to significantly improved oxygen evolution reaction (OER) activity with an onset overpotential of merely 290 mV, and a low overpotential of 330 mV to afford a current density of 10 mA cm⁻². The well‐constructed microarchitecture contributes to superior long term stability electrochemical behaviors. This work provides a facile strategy via composition tuning and structure optimization for the development of next‐generation nonprecious metal‐based OER electrocatalysts.

中文翻译：

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CoOx-MoC的微带杂化结构封装在MOF衍生的N掺杂碳纳米线中，作为高效的析氧电催化剂

开发用于氧气释放的高效电催化剂对于可再生和可持续能源的生产和储存至关重要。本文首次报道了氮掺杂碳包裹的CoOx-MoC异质结构作为高性能的析氧电催化剂。可以通过添加Mo源来调节组成，以形成纳米线组装的分层多孔微结构，该结构可以扩大比表面积，从而暴露出更多的活性位点，从而促进质量传输和电荷转移。此外，还证明了CoOx-MoC异质结构的形成以及由此产生的MoC和Co之间的协同效应促进了反应动力学，从而显着提高了氧释放反应（OER）的活性，其起始超电势仅为290 mV，⁻²。结构良好的微体系结构有助于实现卓越的长期稳定性电化学行为。这项工作通过组成调整和结构优化为下一代非贵金属基OER电催化剂的开发提供了一种简便的策略。