Modified bluing treatment to produce nickel-cobalt-iron spinel oxide with promoted oxygen-evolving performance

A rapid modified bluing treatment approach was proposed for the facile synthesis of a ternary NiCoFe spinel oxide catalyst. Benefitted from the synergy of multi-elements, the enriched high-valence species and good structural stability, highly efficient and durable oxygen-evolving performance was achieved, offering an economic route for the batch preparation of advanced electrocatalysts.