Hierarchical sea urchin-like Fe-doped heazlewoodite for high-efficient oxygen evolution

Electrochemical water-splitting to produce hydrogen is potential to substitute the traditional industrial coal gasification, but the oxygen evolution kinetics at the anode remains sluggish. In this paper, sea urchin-like Fe doped Ni3S2 catalyst growing on nickel foam (NF) substrate is constructed vi...

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Bibliographic Details
Published in:Chemphyschem 2024-05, Vol.25 (9), p.e202300414-e202300414
Main Authors: Kun, Shang, Junpo, Guo, Yingjun, Ma, Liu, Hangning, Xiaoling, Zhang, Huizhen, Wang, Wang, Jie, Yan, Zhenhua
Format: Article
Language:English
Subjects:
Catalysts
Coal gasification
Energy conversion
Iron
Metal foams
Nickel sulfide
Oxygen evolution reactions
Reaction kinetics
Substrates
Water splitting
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Summary:Electrochemical water-splitting to produce hydrogen is potential to substitute the traditional industrial coal gasification, but the oxygen evolution kinetics at the anode remains sluggish. In this paper, sea urchin-like Fe doped Ni3S2 catalyst growing on nickel foam (NF) substrate is constructed via a simple two-step strategy, including surface iron activation and post sulfuration process. The NF-Fe-Ni3S2 obtains at temperature of 130 ℃ (NF-Fe-Ni3S2-130) features nanoneedle-like arrays which are vertically grown on the particles to form sea urchin-like morphology, features high electrochemical surface area. As oxygen evolution catalyst, NF-Fe-Ni3S2-130 exhibits excellent oxygen evolution activities, fast reaction kinetics, and superior reaction stability. The excellent OER performance of sea urchin-like NF-Fe-Ni3S2-130 is mainly ascribed to the high-vertically dispersive of nanoneedles and the existing Fe dopants, which obviously improved the reaction kinetics and the intrinsic catalytic properties. The simple preparation strategy is conducive to establish high-electrochemical-interface catalysts, which shows great potential in renewable energy conversion.
ISSN:1439-4235
1439-7641
DOI:10.1002/cphc.202300414