High-activity Ce–CoB porous electrocatalysts via cerium doping for superior OER performance

Abstract

Ce-doped cobalt boride (Ce–CoB) was synthesized via a ZIF-67-derived boridation strategy, where Ce incorporation synergistically tunes the electronic structure to accelerate oxygen evolution kinetics. The Ce–CoB achieves an overpotential of 320 mV at 10 mA cm⁻², outperforming benchmark CoB by 15.8% (vs. 350 mV) with remarkable robustness. These attributes position Ce–CoB as a scalable, high-efficiency OER catalyst for alkaline water electrolysis.