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Microwave-assisted fast synthesis of hierarchical NiCo2O4 nanoflower-like supported Ni(OH)2 nanoparticles with enhanced electrocatalytic activity for methanol

Abstract

NiCo2O4 nanoflowers are a type of Ni(OH)2 nanoparticle support synthesized through microwave-assisted hydrothermal method. In three-dimensional NiCo2O4 nanoflowers, two-dimensional ultrathin nanosheets supported the Ni(OH)2 nanoparticles by coordination of homogeneous precipitation. Materials are characterized through field-emission-scanning electron microscopy, transmission electron microscopy, x-ray photoelectron spectroscopy, and Raman spectroscopy. Electrochemical oxidation of methanol is probed through NiCo2O4/Ni(OH)2 modification on a glassy carbon electrode in alkaline medium employing cyclic voltammetry (CV) and chronoamperometry (CA). The current density of NiCo2O4/Ni(OH)2 electrode in 1 M KOH with 0.5 M methanol ascends to 92.3 A g−1, and the current density restores to 94.6% of the primitive value through the replacement with a new solution after a long-term CV cycle (500 cycles). Therefore, the compounds further corroborates their excellent electrocatalytic activity and super perennial stability for methanol oxidation. This study demonstrates that NiCo2O4/Ni(OH)2 is a peculiar material with outstanding performance in direct methanol fuel cells.

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Publication details

The article was received on 21 Sep 2017, accepted on 08 Nov 2017 and first published on 10 Nov 2017


Article type: Research Article
DOI: 10.1039/C7QI00583K
Citation: Inorg. Chem. Front., 2017, Accepted Manuscript
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    Microwave-assisted fast synthesis of hierarchical NiCo2O4 nanoflower-like supported Ni(OH)2 nanoparticles with enhanced electrocatalytic activity for methanol

    B. Wang, Y. Cao, Y. Chen, R. Wang, X. Wang, X. Lai, C. Xiao, J. Tu and S. Ding, Inorg. Chem. Front., 2017, Accepted Manuscript , DOI: 10.1039/C7QI00583K

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