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Issue 3, 2019
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Amorphous cobalt–iron hydroxides as high-efficiency oxygen-evolution catalysts based on a facile electrospinning process

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Abstract

Amorphous hydroxide on a foamed nickel substrate was fabricated by a simple and efficient electrospinning method for the first time. In untreated alkaline medium, amorphous cobalt (Co)–iron (Fe) hydroxide showed oxygen-evolution advantages over the typical reference catalyst (RuO2). When tested with a three-electrode system in 1 M KOH, the obtained amorphous PVP/CoFe1.3 nanofibers possessed remarkable catalytic activity and stability for the oxygen evolution reaction (OER) with a low overpotential of 0.267 V at 100 mA cm−2 and a low Tafel slope of 47.43 mV dec−1. The amorphous CoFe microfibers were synthesized by electrospinning, and stable CoFe hydroxides can be further formed in the alkaline environment. The synergistic effect between two different amorphous CoFe-based hydroxides contributed to excellent electrocatalytic activity. Therefore, the design of amorphous CoFe hydroxide enabled the development of a high-efficiency OER catalyst and opens possibilities for the large-scale and environmentally friendly production of water splitting.

Graphical abstract: Amorphous cobalt–iron hydroxides as high-efficiency oxygen-evolution catalysts based on a facile electrospinning process

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Publication details

The article was received on 08 Dec 2018, accepted on 16 Jan 2019 and first published on 17 Jan 2019


Article type: Research Article
DOI: 10.1039/C8QI01320A
Citation: Inorg. Chem. Front., 2019,6, 687-693

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    Amorphous cobalt–iron hydroxides as high-efficiency oxygen-evolution catalysts based on a facile electrospinning process

    Z. Guo, W. Ye, X. Fang, J. Wan, Y. Ye, Y. Dong, D. Cao and D. Yan, Inorg. Chem. Front., 2019, 6, 687
    DOI: 10.1039/C8QI01320A

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