NDLI: Facile synthesis of electrospun MFe<sub>2</sub>O<sub>4</sub> (M = Co, Ni, Cu, Mn) spinel nanofibers with excellent electrocatalytic properties for oxygen evolution and hydrogen peroxide reduction

Content Provider	Royal Society of Chemistry (RSC)
Author	Xiong, Yueping Han, Ce Bo, Xiangjie Guo, Liping Liu, Xiaotian Zhang, Yufan Li, Mian
Copyright Year	2015
Abstract	Designing and preparing porous transition metal ferrites without using any template, shape-directing agent, and surfactant is a challenge. Herein, heterojunction MFe2O4 (M = Co, Ni, Cu, Mn) nanofiber (NF) based films with three-dimensional configurations were synthesized by electrospinning and the subsequent thermal treatment processes. Characterization results indeed show the 3D net-like textural structures of the electrospun spinel-type MFe2O4 NFs. In particular, the resulting MFe2O4 NFs have lengths up to several dozens of micrometers with an average diameter size of about 150 nm and possess abundant micro/meso/macropores on both the surface and within the films. The hierarchically porous structures and high surface areas of these MFe2O4 NFs (for example, the CoFe2O4 NFs possess a larger BET specific surface area (61.48 m2 g−1) than those of the CoFe2O4 NPs (5.93 m2 g−1)) can afford accessible transport channels for effectively decreasing the mass transport resistances, enhancing the electrical conductivity, and increasing the density and reactivity of the exposed catalytic active sites. All these advantages will be responsible for the better electrocatalytic performances of these MFe2O4 NFs compared with their structural isomers (i.e. the MFe2O4 NPs) for the oxygen evolution reaction (OER) and H2O2 reduction in alkaline solution. Meanwhile, both the OER and H2O2 reduction catalytic activities for these MFe2O4 NFs obey the order of CoFe2O4 NFs > CuFe2O4 NFs > NiFe2O4 NFs > MnFe2O4 NFs > Fe2O3 NFs. The CoFe2O4 NFs represent a new class of highly efficient non-noble-metal catalysts for both OER and H2O2 reduction/detection in alkaline media.
Starting Page	8920
Ending Page	8930
Page Count	11
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	7
Issue Number	19
Journal	Nanoscale
DOI	10.1039/c4nr07243j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Hydrogen peroxide Electrospinning Nanofiber Specific surface area Transition metal Surfactant Three-dimensional space BET Electrical resistivity and conductivity Cu NF Oxygen evolution Heterojunction
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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