Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2740

Full Length Research Paper

Electrochemical investigation and capacitance properties of a novel electrodeposited ordered mesoporous cobalt hydroxide films

Y. Obaid1, I. S. El-Hallag2*, E. H. El-Mossalamy1, A. O. Al-Youbi1 and A.M. Asiri1
  1Chemistry Department, Faculty of Science, King Abdul Aziz University, P. O. Box 80203, Jeddah 21589 Saudi Arabia. 2Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt.
Email: [email protected]

  •  Accepted: 07 June 2012
  •  Published: 26 July 2012

Abstract

 

The present work explored a novel, simple and low cost electrochemical route for the investigation of ordered mesoporous cobalt hydroxide films electrodeposited onto gold substrate from cobalt acetate in pluronic lyotropic liquid crystal (P84). This method produces thin films of cobalt hyhdroxid mesostructures on gold substrate by combination of potentiostatic and voltammetric electrodeposition techniques. The prepared nanomaterials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction (XRD). Electrochemical capacitance properties of cobalt hydroxide films were evaluated via cyclic voltammetry method. The film showed maximum specific capacitance of 727 F/g in 1 M sodium hydroxide electrolyte at scan rate of 5 mV/s. This indicates the potential application of cobalt films in electrochemical supercapacitors.

 

Key words: Electrodeposition, mesostructures, electrochemical measurements, specific capacitance, supercapacitors.