NDLI: Nickel foam supported mesoporous NiCo<sub>2</sub>O<sub>4</sub> arrays with excellent methanol electro-oxidation performance

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Yingnan Wang, Wei Zhu, Wei Liu, Xiaoyang Chu, Qingxin Wang, Xiaofeng
Copyright Year	2015
Abstract	In this study, nickel foam supported NiCo2O4 nanosheet and nanocloth arrays are directly prepared by a mild hydrothermal method and applied to methanol electro-oxidation. Several techniques, including powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive spectroscopy (EDS) and nitrogen absorption measurements, have been employed to characterize the physicochemical properties of the as-prepared catalysts. The electrocatalytic performances are investigated by cyclic voltammetry (CV), chronoamperometry (CA) measurements and electrochemical impedance spectroscopy (EIS). Impressively, NiCo2O4 nanosheet and nanocloth arrays both deliver excellent electrocatalytic performance for methanol electro-oxidation in an alkaline medium, including low onset potential (0.19 V, 0.16 V), high current densities (111 mA cm−2, 134 mA cm−2) and a desirable electro-oxidation stability (90%, 88%). The excellent electrocatalytic performances of nickel foam supported NiCo2O4 nanosheet and nanocloth arrays originate from their unique 3D mesoporous architecture, which can provide adequate open spaces and shorter ion diffusion paths to facilitate rapid ionic transportation.
Starting Page	6491
Ending Page	6497
Page Count	7
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	39
Issue Number	8
Journal	New Journal of Chemistry
DOI	10.1039/c5nj00766f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Spectroscopy Nanosheet Ion Photoemission spectroscopy Nitrogen Scanning electron microscope Three-dimensional space X-ray crystallography Cyclic voltammetry Mesoporous material Transmission electron microscopy Hydrothermal circulation Electrochemistry Nickel Chronoamperometry Diffusion X-ray photoelectron spectroscopy Methanol Electrical impedance
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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