Micelle-template synthesis of a 3D porous FeNi alloy and nitrogen-codoped carbon material as a bifunctional oxygen electrocatalyst

The sluggish kinetics of oxygen reduction reaction and oxygen evolution reaction (ORR/OER) are the key scientific issues that need to be addressed for the application of renewable energy technologies. Rational coupling transition metal with porous heteroatom-doped carbon is extensively investigated...

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Bibliographic Details
Published in:Electrochimica acta 2020-01, Vol.331, p.135375, Article 135375
Main Authors: Li, Guang-Lan, Xu, Xiao-Cun, Yang, Bei-Bei, Cao, Shuo, Wang, Xingyu, Fu, Xudong, Shi, Yantao, Yan, Yang, Song, Xuedan, Hao, Ce
Format: Article
Language:English
Subjects:
Block copolymers
Carbon
Carbon nitride
Catalysts
Energy technology
FeNi alloy nanoparticles
Micelles
N-doped carbon electrocatalyst
Nitrogen
Oxygen evolution reactions
Oxygen reduction and evolution reaction
Oxygen reduction reactions
Poloxamers
Reaction kinetics
Renewable energy
Renewable resources
Structural hierarchy
Surfactant and soft template
Transition metals
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Summary:The sluggish kinetics of oxygen reduction reaction and oxygen evolution reaction (ORR/OER) are the key scientific issues that need to be addressed for the application of renewable energy technologies. Rational coupling transition metal with porous heteroatom-doped carbon is extensively investigated as an efficient strategy to achieve high performance ORR/OER nonprecious metal electocatalysts. In this study, a FeNi alloy coated with N-doped carbon material (namely FeNi/NC) was designed by using triblock copolymer Pluronic F127 as a surfactant co-assembly with g-C3N4. This strategy enabled FeNi/NC possessing a high BET surface area in terms of three-dimensional hierarchical porous structure together with abundant defect sites. The optimized FeNi/NC catalyst displays an excellent oxygen electrode electrocatalytic activity with a potential gap △E of 0.77 V in alkaline media which substantially outperformed benchmark Pt/C + RuO2 (△E = 0.80 V). Furthermore, it shows almost no decay after long-time cycling tests for ORR/OER. The excellent catalytic performance along with the low cost for FeNi/NC catalyst makes it possible to commercialize the renewable energy devices.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2019.135375