Tailoring composition and morphology of electrocatalysts is of great importance in improving their catalytic performance. Herein, a salt‐templated strategy is proposed to construct novel multicomponent Co/Co_xM_y (M = P, N) hybrids with outstanding electrocatalytic performance for the oxygen evolution reaction (OER). The obtained Co/Co_xM_y hybrids present porous sheet‐like architecture consisting of many hierarchical secondary building‐units. The synthetic strategy depends on a facile and effective dissolution–recrystallization–pyrolysis process under NH₃ atmosphere of the precursors, which does not involve any surfactant or long‐time hydrothermal pretreatment. That is different from the conventional methods for the synthesis of hierarchical nitrides/phosphides. Benefitting from unique composition/structure‐dependent merits, the Co/Co_xM_y hybrids as a typical Mott–Schottky electrocatalyst exhibit good OER performance in an alkaline medium compared with their counterparts, as evidenced by a low overpotential of 334 mV at 10 mA cm⁻² and a small Tafel slope of 79.2 mV dec⁻¹, as well as superior long‐term stability. More importantly, the Co/Co_xM_y+Pt/C achieves higher voltaic efficiency and several times longer cycle life than conventional RuO₂+Pt/C catalysts in rechargeable Zn–air batteries. It is envisioned that the present work can provide a new avenue for the development of Mott–Schottky electrocatalysts for sustainable energy storage.

中文翻译：

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分层多孔Co / CoxMy（M = P，N）作为可充电Zn-空气电池中氧气释放的高效Mott-Schottky电催化剂

量身定制电催化剂的组成和形态对于提高其催化性能非常重要。本文提出了一种以盐为模板的策略，以构建对氧释放反应（OER）具有出色电催化性能的新型多组分Co / Co _x M _y（M = P，N）杂化物。获得的Co / Co _x M _y杂种呈现出多孔薄板状结构，由许多分层的二级建筑单元组成。合成策略取决于NH ₃下的简便有效的溶解-重结晶-热解过程前驱体的气氛，不涉及任何表面活性剂或长时间的水热预处理。这不同于用于合成分层氮化物/磷化物的常规方法。得益于独特的组成/结构优势，Co / Co _x M _y杂化物作为典型的Mott-Schottky电催化剂，在碱性介质中与同类催化剂相比具有良好的OER性能，这在10 mA时低334 mV的低电势得到了证明。 cm ^-2和79.2 mV dec ^-1的小Tafel斜率以及出色的长期稳定性。更重要的是，Co / Co _x M _y+ Pt / C在可充电Zn-空气电池中比常规RuO ₂ + Pt / C催化剂具有更高的伏打效率，并且循环寿命长数倍。可以预见，目前的工作可以为开发用于可持续储能的莫特-肖特基电催化剂提供新的途径。