ZIF-67-derived petal-like Co(OH)2-MoO3/NF layered nanosheets as a promising electrocatalyst for oxygen evolution reaction

The development of high-performance and cost-effective electrocatalysts for oxygen evolution reactions (OER) is key to renewable energy conversion and storage technologies. In this paper, a hierarchical Co(OH)2-MoO3 nanosheets with petal-like architecture was prepared by a simple one-step hydrothermal method using ZIF-67/NF as a precursor, and it was used as a direct electrocatalyst for OER. Notably, this petal-like Co(OH)2-MoO3/NF layered nanosheets not only prevent the agglomeration of nanostructured material, but also facilitate the complete penetration and diffusion of electrolyte. In addition, due to the strong electronic interaction between Co(OH)2 and MoO3 in the Co(OH)2-MoO3/NF system, Co(OH)2-MoO3/NF exhibits excellent electrocatalytic OER performance. It has a low overpotential of 273 mV at 10 mA cm−2 and excellent stability. This study provides a simple and effective strategy for the rational design and structural evolution of MOF-derived materials to achieve inexpensive and effective electrocatalysis.