Low-cost CoFe2O4/biomass carbon hybrid from metal-enriched sulfate reducing bacteria as an electrocatalyst for water oxidation

The development of electrocatalysts for the Oxygen Evolution Reaction (OER) requires extensive and challenging research for the water splitting and fuel cell applications. Herein, we report a low-cost CoFe2O4/biomass carbon (CFO@BC/Zn) hybrid from Co-enriched Sulfate Reducing Bacteria (Co-SRB) as an...

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Bibliographic Details
Published in:RSC advances 2018-01, Vol.8 (40), p.22799-22805
Main Authors: Bi, Songhu, Li, Jingde, Zhong, Qin, Chen, Chuntan, Zhang, Qiyi, Yao, Yongyi
Format: Article
Language:English
Subjects:
Bacteria
Biomass
Carbon
Chemistry
Cobalt ferrites
Density functional theory
Electrocatalysts
Fuel cells
Low cost
Oxidation
Oxygen evolution reactions
Sulfate reduction
Water splitting
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Summary:The development of electrocatalysts for the Oxygen Evolution Reaction (OER) requires extensive and challenging research for the water splitting and fuel cell applications. Herein, we report a low-cost CoFe2O4/biomass carbon (CFO@BC/Zn) hybrid from Co-enriched Sulfate Reducing Bacteria (Co-SRB) as an electrocatalyst for OER. The electrocatalyst exhibits a low potential of 1.53 V at a current density 10 mA cm−2 and Tafel slope of 86 mV dec−1. This method does not require high-cost or long periods of preparation. The density-functional theory (DFT) calculations show a small barrier for oxygen conversion on Fe3+ of CFO (100) surface. The synthesis of CFO@BC/Zn may be a new approach for obtaining low-priced electrocatalysts for OER.
ISSN:2046-2069
DOI:10.1039/c8ra02959h