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Issue 15, 2019
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High-performance electrolytic oxygen evolution with a seamless armor core–shell FeCoNi oxynitride

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Abstract

Highly active, low-cost, and durable electrocatalysts for the water oxidation reaction are pivotal in energy conversion and storage schemes. Here we report a nitride-core, oxide-shell-armor structured FeCoNi oxynitride as an efficient oxygen evolution electrocatalyst with a homogeneous nitride (Fe0.70Co0.56Ni0.92N1.0O0.06) core and an oxide (Fe0.48Co0.1Ni0.21N0.05O1.0) shell. The catalyst demonstrated excellent activity for the oxygen evolution reaction with a current density of 10 mA cm−2 at a low overpotential of 0.291 V in alkaline media (1 M KOH), which is superior to the activities of commercial IrO2, RuO2, and Pt/C catalysts and comparable to those of state-of-the-art catalysts (e.g., NiFe-LDH, NiCo2O4, O-NiCoFe-LDH). Density functional theory simulations suggested that the incorporation of multiple metal elements can indeed improve the reaction energetics with a synergistic effect from the core–shell structure. This unique structure of a nitride-core with a oxide-shell presents a new form of multimetallic oxynitride with compelling performance in electrolytic oxygen evolution.

Graphical abstract: High-performance electrolytic oxygen evolution with a seamless armor core–shell FeCoNi oxynitride

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Publication details

The article was received on 18 Dec 2018, accepted on 08 Mar 2019 and first published on 11 Mar 2019


Article type: Paper
DOI: 10.1039/C8NR10191D
Nanoscale, 2019,11, 7239-7246

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    High-performance electrolytic oxygen evolution with a seamless armor core–shell FeCoNi oxynitride

    J. Di, H. Zhu, J. Xia, J. Bao, P. Zhang, S. Yang, H. Li and S. Dai, Nanoscale, 2019, 11, 7239
    DOI: 10.1039/C8NR10191D

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