Hierarchical porous Co3O4@CoxFe3−xO4 film as an advanced electrocatalyst for oxygen evolution reaction

Abstract

Fabricating a delicate structure for water oxidation is critical for developing highly efficient electrocatalysts, which hold significant promise for energy conversion devices. Herein, we show an effective approach for constructing a Co₃O₄@Co_xFe_3−xO₄ hierarchical nanostructure with obviously improved electrocatalytic activity relative to Co_xFe_3−xO₄ nanoplate and Co₃O₄ nanowire films. The enhancement is attributed to the formation of secondary Co_xFe_3−xO₄ nanoplates outside of the Co₃O₄ nanowires, leading to a fantastic porous architecture that results in a more active electrocatalyst.