2017/12/12 by Pathik Sahoo, Jing‐Bo Tan, Zhiming Zhang +2 · 1 citation
Energy · Engineering · #Electrocatalysts for Energy Conversion #Advanced battery technologies research #Advanced Photocatalysis Techniques
paper · doi:10.1002/cctc.201701790
openalex publication_date 2017/12/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/27
Abstract Cost‐effective production of efficient and robust oxygen evolution electrocatalysts is of primary importance in developing renewable energy technologies. Herein, we develop a simple and efficient method for exploring high‐performance oxygen evolution reaction (OER) electrocatalysts by engineering the surface structure of ferrite nanoparticles on carbon nanotube support through a reduction‐engraved strategy. After the reduction treatment, abundant oxygen vacancies localized on the surface of the ultrafine ferrite nanoparticles favorably affect their electronic structure, assuring a rapid charge transfer, and expose more active sites. In 1.0 m KOH solution, the reduced composites exhibit superior OER electrocatalytic activity to IrO 2 , affording a current density of 10 mA cm −2 at overpotentials of merely 214 mV for Co 0.5 Ni 0.5 Fe 2 O 4 @o‐MWCNT ( r‐CNFc ), 221 mV for CoFe 2 O 4 @o‐MWCNT ( r‐CFc ), and 216 mV for NiFe 2 O 4 @o‐MWCNT ( r‐NFc ). It is worth mentioning that r‐CNFc could afford a current density of 100 mA cm −2 at an overpotential of 256 mV, which is approximately ten times higher than that of CNFc at the same overpotential (10.6 mA cm −2 ). These catalysts also exhibit long‐term stability evaluated by controlled‐current electrolysis at least for 120 h. These results demonstrate an efficient method for constructing high‐performance and durable OER electrocatalysts by reducing mixed metal spinel oxides on the conductive support.