Abstract Exploration of non-noble metal electrocatalysts for efficient and durable oxygen evolution reaction (OER) is highly desirable but still remains a great challenge. Herein, we report the rational design and synthesis of heterostructured ZnCo2O4/FeOOH hollow polyhedrons (ZnCo2O4/FeOOH HPs) as a high-efficient electrocatalyst for OER in alkaline condition. ZnCo2O4 hollow polyhedrons (ZnCo2O4 HPs), which derived from the bimetallic Zn, Co-zeolitic imidazolate frameworks (ZnCo-ZIFs), are employed as the substrate for the growth of FeOOH nanowires. Benefiting from the hollow structure as well as the synergistic effect between ZnCo2O4 HPs and FeOOH nanowires, the ZnCo2O4/FeOOH HPs show enhanced OER activity with a low overpotential of 299 mV at the current density of 10 mA cm−2 and excellent durability. This work offers a promising strategy to develop high-efficient and robust non-noble metal electrocatalysts for large-scale electrochemical applications.

中文翻译：

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用于析氧反应的金属有机框架衍生的异质结构 ZnCo2O4@FeOOH 空心多面体

摘要 探索用于高效且持久的析氧反应 (OER) 的非贵金属电催化剂是非常理想的，但仍然是一个巨大的挑战。在此，我们报告了异质结构 ZnCo2O4/FeOOH 中空多面体（ZnCo2O4/FeOOH HPs）的合理设计和合成，作为碱性条件下 OER 的高效电催化剂。ZnCo2O4 中空多面体 (ZnCo2O4 HPs) 衍生自双金属 Zn、Co-沸石咪唑酯骨架 (ZnCo-ZIFs)，被用作 FeOOH 纳米线生长的基材。得益于中空结构以及 ZnCo2O4 HPs 和 FeOOH 纳米线之间的协同效应，ZnCo2O4/FeOOH HPs 表现出增强的 OER 活性，在 10 mA cm−2 的电流密度下具有 299 mV 的低过电位和优异的耐久性。