Amorphous nickel-iron oxides/carbon nanohybrids for an efficient and durable oxygen evolution reaction

Highly efficient and durable water oxidation electrocatalysts are critically important in a wide range of clean energy technologies,including water electrolyzers and rechargeable metal-air batteries.Here,we report a novel sonochemical approach to synthesize amorphous nickel-iron oxides/carbon nanohy...

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Bibliographic Details
Published in:Nano research 2017-11, Vol.10 (11), p.3629-3637
Main Authors: Li, Bo, Chen, Shuangming, Tian, Jie, Gong, Ming, Xu, Hangxun, Song, Li
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Batteries
Biomedicine
Biotechnology
Carbon
Chemical synthesis
Chemistry and Materials Science
Clean energy
Clean technology
Condensed Matter Physics
Electrocatalysts
Energy technology
Iron oxides
Materials Science
Metals
Nanotechnology
Nickel
Nickel ferrites
Oxidation
Oxides
Oxygen
Oxygen evolution reactions
Rechargeable batteries
Research Article
Ruthenium oxide
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Summary:Highly efficient and durable water oxidation electrocatalysts are critically important in a wide range of clean energy technologies,including water electrolyzers and rechargeable metal-air batteries.Here,we report a novel sonochemical approach to synthesize amorphous nickel-iron oxides/carbon nanohybrids with tunable compositions for the oxygen evolution reaction （OER）.The sonochemically synthesized amorphous electrocatalysts with optimal composition exhibit a low overpotential of 290 mV at 10 mA＆#183;cm-2 and a Tafel slope of 31 mV＆#183;decade-1 in a 0.1 M KOH electrolyte,outperforming the benchmark RuO2 catalyst.Meanwhile,these nanohybrids are also highly stable and remain amorphous even after prolonged cycling.In addition to amorphism,sonochemistry endows as-prepared nickel-iron oxides/carbon nanohybrids with a simultaneously formed carbon scaffold and internal Ni（0）,which can enhance the stability and activity for the OER.This work demonstrates that sonochemistry is a unique method for synthesizing amorphous metal oxides toward an efficient and durable OER.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-017-1572-9