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An efficient amplification strategy for N-doped NiCo2O4 with oxygen vacancies and partial Ni/Co-nitrides as a dual-function electrode for both supercapatteries and hydrogen electrocatalysis

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Abstract

To obtain transition-metal-oxide-based materials with remarkable energy storage and conversion performance, rational design and synthesis of electrodes with abundant active sites is crucial. Herein, we propose an effective strategy for nitrogen doping in NiCo2O4 (NCO) nanowire arrays using NH3 plasma treatment. N-doped NCO contains oxygen vacancies with nitrogen atoms, nickel/cobalt nitrides, and high concentrations of Ni2+ and Co2+ within the structure, leading to high electrical conductivity. As expected, N-doped NCO electrodes exhibited excellent electrochemical performance for supercapacitors and hydrogen evolution reaction (HER) electrocatalysis in KOH electrolyte. This work provides a promising pathway toward developing advanced electrodes.

Graphical abstract: An efficient amplification strategy for N-doped NiCo2O4 with oxygen vacancies and partial Ni/Co-nitrides as a dual-function electrode for both supercapatteries and hydrogen electrocatalysis

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Publication details

The article was received on 26 Jul 2018, accepted on 14 Nov 2018 and first published on 17 Nov 2018


Article type: Paper
DOI: 10.1039/C8TA07210H
Citation: J. Mater. Chem. A, 2019, Advance Article
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    An efficient amplification strategy for N-doped NiCo2O4 with oxygen vacancies and partial Ni/Co-nitrides as a dual-function electrode for both supercapatteries and hydrogen electrocatalysis

    K. Choi, I. K. Moon and J. Oh, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA07210H

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