Ordered mesoporous spinel CoFe2O4 as efficient electrocatalyst for the oxygen evolution reaction

Oxygen evolution reaction (OER) from water using transition metal-based catalyst is of significance for the wide spread of future renewable energy materials. Herein, we propose a novel strategy to synthesize cobalt iron oxides (CoFe2O4) with different ordered mesoporous structure by using a facial h...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2019-05, Vol.840, p.409-414
Main Authors: Huang, Yarong, Yang, Weiwei, Yu, Yongsheng, Hao, Sue
Format: Article
Language:English
Subjects:
Aqueous solutions
Catalysis
Catalysts
Chemical synthesis
Cobalt ferrite
Cobalt ferrites
Electrocatalysts
Hard template
Iron oxides
Mesoporous structure
Oxygen evolution
Oxygen evolution reactions
Transition metals
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Summary:Oxygen evolution reaction (OER) from water using transition metal-based catalyst is of significance for the wide spread of future renewable energy materials. Herein, we propose a novel strategy to synthesize cobalt iron oxides (CoFe2O4) with different ordered mesoporous structure by using a facial hard template method. Benefiting from the ordered mesoporous structure, the optimized electrocatalyst achieved a small overpotential of 342mV to reach 10mAcm−2 current density, a low Tafel slope of 57.1mV dec−1 in a 1M KOH aqueous medium, and excellent stability for 15h, which OER performance is the best after the comparison of lasted reported CoFe2O4-based electrocatalysts. This work not only provides an approach for synthesizing efficient OER catalysts but also highlights a novel tactic to optimize the OER electrocatalysts according to regulate the porous structure. •Mesoporous CoFe2O4 have been prepared successfully by different hard template.•Mesoporous CoFe2O4 is designed for alkaline OER catalyst.•Mesoporous CoFe2O4 showed high OER performance and good stability.•The unique mesoporous structure provides large numbers of active sites thus improving their catalytic performance.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2019.04.010