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Title: Facile synthesis of {alpha}-MnO{sub 2} one-dimensional (1D) nanostructure and energy storage ability studies

Abstract

The dense manganese oxide nanorods with an extremely narrow distribution are synthesized at a low temperature using first cathodic electrodeposition subsequently heat treatment. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images show that the nanorods have bar shapes, and their average diameter is less than 50 nm. The Fourier transform infrared (FT-IR) study, the selected area electron diffraction (SAED) pattern in TEM images and the X-ray diffraction (XRD) result show that the nanorods are {alpha}-MnO{sub 2} single crystal. The results of N{sub 2} adsorption-desorption analysis indicate that the BET surface area of the {alpha}-MnO{sub 2} nanorods is 93 m{sup 2} g{sup -1}. By recording the potential-time curve during the electrodeposition process, it is revealed that water reduction reaction has a major role in the electrogeneration of base at the cathode surface under the applied electrochemical conditions. Finally, based on the H{sub 2} bubbling on the cathode surface, the mechanism of the formation and the growth of {alpha}-MnO{sub 2} nanorods are proposed and discussed. For the electrochemical supercapacitor application, electrochemically prepared {alpha}-MnO{sub 2} is found to be stable for a large number of cycles with high specific capacitance, 338 F g{sup -1} at a scan rate of 10 mVmore » s{sup -1}. Finally, the charge-discharge mechanism is discussed. - Graphical abstract: Highlights: Black-Right-Pointing-Pointer New nanostructures of MnO{sub 2} is synthesized by simple method of cathodicelectrodeposition. Black-Right-Pointing-Pointer The product has unique one-dimensional morphology with average diameter size of 50 nm. Black-Right-Pointing-Pointer The experiment conditions (temperature, current density) has not been reported. Black-Right-Pointing-Pointer The one-nanostructures obtained without using of hard template or surfactant.« less

Authors:
 [1];  [2];  [3];  [1];  [4]
  1. Department of Chemistry, Tarbiat Moallem University, PO Box: 31979-37551, Tehran (Iran, Islamic Republic of)
  2. (Iran, Islamic Republic of)
  3. Materials Research School, NSTRI, PO Box: 14395-836, Tehran (Iran, Islamic Republic of)
  4. Department of Optic and Spectroscopy, Lasers and Optics Research School, NSTRI, PO Box: 11365-8486, Tehran (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22012148
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: . 190; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ADSORPTION; DESORPTION; ELECTRODEPOSITION; ELECTRON DIFFRACTION; FOURIER TRANSFORMATION; HEAT TREATMENTS; INFRARED SPECTRA; MANGANESE OXIDES; MONOCRYSTALS; NANOSTRUCTURES; ONE-DIMENSIONAL CALCULATIONS; SCANNING ELECTRON MICROSCOPY; SHAPE; SURFACE AREA; SURFACES; SURFACTANTS; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Yousefi, Taher, E-mail: anozadg@yahoo.com, Materials Research School, NSTRI, PO Box: 14395-836, Tehran, Golikand, Ahmad Nozad, E-mail: taher_yosefy@yahoo.com, Hossein Mashhadizadeh, Mohammad, and Aghazadeh, Mustafa. Facile synthesis of {alpha}-MnO{sub 2} one-dimensional (1D) nanostructure and energy storage ability studies. United States: N. p., 2012. Web. doi:10.1016/J.JSSC.2012.01.062.
Yousefi, Taher, E-mail: anozadg@yahoo.com, Materials Research School, NSTRI, PO Box: 14395-836, Tehran, Golikand, Ahmad Nozad, E-mail: taher_yosefy@yahoo.com, Hossein Mashhadizadeh, Mohammad, & Aghazadeh, Mustafa. Facile synthesis of {alpha}-MnO{sub 2} one-dimensional (1D) nanostructure and energy storage ability studies. United States. doi:10.1016/J.JSSC.2012.01.062.
Yousefi, Taher, E-mail: anozadg@yahoo.com, Materials Research School, NSTRI, PO Box: 14395-836, Tehran, Golikand, Ahmad Nozad, E-mail: taher_yosefy@yahoo.com, Hossein Mashhadizadeh, Mohammad, and Aghazadeh, Mustafa. Fri . "Facile synthesis of {alpha}-MnO{sub 2} one-dimensional (1D) nanostructure and energy storage ability studies". United States. doi:10.1016/J.JSSC.2012.01.062.
@article{osti_22012148,
title = {Facile synthesis of {alpha}-MnO{sub 2} one-dimensional (1D) nanostructure and energy storage ability studies},
author = {Yousefi, Taher, E-mail: anozadg@yahoo.com and Materials Research School, NSTRI, PO Box: 14395-836, Tehran and Golikand, Ahmad Nozad, E-mail: taher_yosefy@yahoo.com and Hossein Mashhadizadeh, Mohammad and Aghazadeh, Mustafa},
abstractNote = {The dense manganese oxide nanorods with an extremely narrow distribution are synthesized at a low temperature using first cathodic electrodeposition subsequently heat treatment. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images show that the nanorods have bar shapes, and their average diameter is less than 50 nm. The Fourier transform infrared (FT-IR) study, the selected area electron diffraction (SAED) pattern in TEM images and the X-ray diffraction (XRD) result show that the nanorods are {alpha}-MnO{sub 2} single crystal. The results of N{sub 2} adsorption-desorption analysis indicate that the BET surface area of the {alpha}-MnO{sub 2} nanorods is 93 m{sup 2} g{sup -1}. By recording the potential-time curve during the electrodeposition process, it is revealed that water reduction reaction has a major role in the electrogeneration of base at the cathode surface under the applied electrochemical conditions. Finally, based on the H{sub 2} bubbling on the cathode surface, the mechanism of the formation and the growth of {alpha}-MnO{sub 2} nanorods are proposed and discussed. For the electrochemical supercapacitor application, electrochemically prepared {alpha}-MnO{sub 2} is found to be stable for a large number of cycles with high specific capacitance, 338 F g{sup -1} at a scan rate of 10 mV s{sup -1}. Finally, the charge-discharge mechanism is discussed. - Graphical abstract: Highlights: Black-Right-Pointing-Pointer New nanostructures of MnO{sub 2} is synthesized by simple method of cathodicelectrodeposition. Black-Right-Pointing-Pointer The product has unique one-dimensional morphology with average diameter size of 50 nm. Black-Right-Pointing-Pointer The experiment conditions (temperature, current density) has not been reported. Black-Right-Pointing-Pointer The one-nanostructures obtained without using of hard template or surfactant.},
doi = {10.1016/J.JSSC.2012.01.062},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = . 190,
place = {United States},
year = {2012},
month = {6}
}