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Synthesis, characterization, and supercapacitive properties of β-Co(OH)2 leaf-like nanostructures

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Abstract

Leaf-like nanostructures of β-Co(OH)2 were successfully prepared via galvanostatically cathodic electrodeposition at the current density of 1 mA cm−2 from an aqueous 0.005 M Co(NO3)2 bath. The bath temperature was fixed at 60 °C. The XRD and FTIR results revealed that the prepared sample has a single phase of the hexagonal brucite-like β-Co(OH)2. Morphological characterization by SEM showed that the prepared β-Co(OH)2 was composed of discrete leaf-like nanostructures with edge lengths ranging from 250 to 450 nm. The electrochemical performance of the prepared β-Co(OH)2 was evaluated using cyclic voltammetry and charge–discharge tests. A maximum specific capacitance of 772.8 F g−1 was obtained in aqueous 1 M KOH with the potential range of −0.3–0.5 V (vs. Ag/AgCl) at scan rate of 10 mV s−1, suggesting the potential application of the prepared nanostructures in electrochemical supercapacitors. Result of this work showed that cathodic electrodeposition can be recognized as a facile method for the preparation of cobalt hydroxide.

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Authors and Affiliations

  1. Materials Research School, NSTRI, P.O. Box: 14395-836, Tehran, Iran

    Mustafa Aghazadeh, Abbas-Ali Malek Barmi & Taher Yousefi

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  1. Mustafa Aghazadeh
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  2. Abbas-Ali Malek Barmi
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  3. Taher Yousefi
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Correspondence to Mustafa Aghazadeh.

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Aghazadeh, M., Malek Barmi, AA. & Yousefi, T. Synthesis, characterization, and supercapacitive properties of β-Co(OH)2 leaf-like nanostructures. J IRAN CHEM SOC 9, 225–229 (2012). https://doi.org/10.1007/s13738-011-0037-4

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  • DOI: https://doi.org/10.1007/s13738-011-0037-4

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