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Strong hydrophilicity NiS2/Fe7S8 heterojunctions encapsulated in N-doped carbon nanotubes for enhanced oxygen evolution reaction

Abstract

The construction of active sites with excellent water oxidation activity is of great significance to the design of OER electrocatalysts. Herein, we propose an anion regulation strategy, in which N-doped carbon nanotubes play a protective role coated Ni3Fe alloy particles, two non-metallic elements S or Se are introduced to adjust the electronic structure, further construct heterogeneous surface, improve valence state, and increase the hydrophilicity of catalysts. The as-prepared catalyst exhibit a considerably OER activity N-CNTs@NiS2/Fe7S8 (overpotential of 330 mV to achieve 50 mA cm-2, Tafel slope of 51.49 mV dec-1) and N-CNTs@NiSe2/Fe3Se4 (360 mV, 72.32 mV dec-1) in 1 M KOH solution.

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Supplementary files

Article information


Submitted
29 Nov 2019
Accepted
02 Jan 2020
First published
02 Jan 2020

Chem. Commun., 2020, Accepted Manuscript
Article type
Communication

Strong hydrophilicity NiS2/Fe7S8 heterojunctions encapsulated in N-doped carbon nanotubes for enhanced oxygen evolution reaction

J. Wang, W. Liu, X. Li, T. Ouyang and Z. Liu, Chem. Commun., 2020, Accepted Manuscript , DOI: 10.1039/C9CC09303F

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