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@CoxFe3−xO4 hierarchical nanostructure with obviously improved electrocatalytic activity relative to CoxFe3−xO4 nanoplate and Co3O4 nanowire films. The enhancement is attributed to the formation of secondary CoxFe3−xO4 nanoplates outside of the Co3O4 nanowires, leading to a fantastic porous architecture that results in a more active electrocatalyst.