Open AccessEffect of synthesis duration on the morphological and structural modification of the sea urchin-nanostructured γ-MnO2 and study of its electrochemical reactivity in alkaline medium
Author(s) -
L. Benhaddad,
Cyrille Bazin,
L. Makhloufi,
Bouzid Messaoudi,
Françoise Pillier,
K. Rahmouni,
H. Takenouti
Publication year - 2014
Publication title -
journal of solid state electrochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.576
H-Index - 84
eISSN - 1433-0768
pISSN - 1432-8488
DOI - 10.1007/s10008-014-2459-2
Subject(s) - materials science , nanorod , cyclic voltammetry , scanning electron microscope , transmission electron microscopy , electrochemistry , hydrothermal synthesis , dielectric spectroscopy , reactivity (psychology) , chemical engineering , hydrothermal circulation , powder diffraction , desorption , adsorption , electrode , nanotechnology , chemistry , crystallography , organic chemistry , composite material , medicine , pathology , engineering , alternative medicine
"The original publication is available at www.springerlink.comInternational audienceSingle-crystalline nanorods and sea urchin-like morphology of the γ-MnO2 nanostructures were successfully synthesized by hydrothermal method at different synthesis durations. The as-synthesized products were characterized by the techniques X-ray powder diffraction (XRD), field emission gun-scanning electron microscope (FEG-SEM) coupled with energy-dispersive X-ray elemental analysis (EDX), transmission electron microscope (TEM), isotherms of N2 adsorption/desorption and BET-BJH models. The effect of synthesis duration on the morphology, porous structure, and crystallographic form of MnO2 powders was studied. The electrochemical reactivity of as-prepared powders was investigated in 1 mol L−1 KOH by both cyclic voltammetry and impedance spectroscopy by using a micro-cavity electrode. The results show that the best electrochemical reactivity of the MnO2 powder was obtained with synthesis duration of 24 h
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