Metal -organic framework -derived heterostructured ZnCo 2 O 4 @FeOOH hollow polyhedrons for oxygen evolution reaction

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. © 2020 Elsevier B.V.