Co-Mof-Derived Zif@Ni-Co-B150 as an Efficient Electrocatalyst for Oxygen Evolution Reaction

Exploiting efficient and earth-abundant non-noble metals electrocatalysts for oxygen evolution reaction (OER) is extremely important for energy conversion and storage infrastructure. Herein, we synthesized a Co-based zeolite imidazolate framework-derived bimetallic boride electrocatalyst by a facile method, named ZIF@Ni-Co-B150, which exhibits excellent OER activity and stability. At the current density of 10 mA cm-2, it has a low overpotential of 300 mV and a low Tafel slope of 77 mV dec-1, which is better than noble metal RuO2. The superior OER performance is attributed to the formation of a metal-boron bond, the morphology of specific dodecahedron, the large surface area and the low charge transfer resistance for the ZIF@Ni-Co-B150. This work will provide new clues for the design and fabrication of metal-organic framework-derived composites, and offer some insights into the construction of crystallinity engineering.