文章基本信息

标题：Facile Synthesis of Core/Shell-like NiCo2O4-Decorated MWCNTs and its Excellent Electrocatalytic Activity for Methanol Oxidation
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作者：Tae-Hoon Ko ; Kesavan Devarayan ; Min-Kang Seo 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2016
卷号：6
期号：1
DOI：10.1038/srep20313
语种：English
出版社：Springer Nature
摘要：The design and development of an economic and highly active non-precious electrocatalyst for methanol electrooxidation is challenging due to expensiveness of the precursors as well as processes and non-ecofriendliness. In this study, a facile preparation of core-shell-like NiCo₂O₄ decorated MWCNTs based on a dry synthesis technique was proposed. The synthesized NiCo₂O₄/MWCNTs were characterized by infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and selected area energy dispersive spectrum. The bimetal oxide nanoparticles with an average size of 6 ± 2 nm were homogeneously distributed onto the surface of the MWCNTs to form a core-shell-like nanostructure. The NiCo₂O₄/MWCNTs exhibited excellent electrocatalytic activity for the oxidation of methanol in an alkaline solution. The NiCo₂O₄/MWCNTs exhibited remarkably higher current density of 327 mA/cm² and a lower onset potential of 0.128 V in 1.0 M KOH with as high as 5.0 M methanol. The impressive electrocatalytic activity of the NiCo₂O₄/MWCNTs is promising for development of direct methanol fuel cell based on non-Pt catalysts.