Electrochemical Behaviour of Cobalt in NaOH Solutions

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Title:Electrochemical Behaviour of Cobalt in NaOH Solutions
Creators:
Abd El Rehim, Sayed S.
El Basosi, Ahmed A.
El Zein, Salah M.
Osman, Magda M.
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 59, 11, pp. 2383-2389

Abstract

<p>The electrochemical behaviour of cobalt in 0.001 - 1 M NaOH was investigated by voltammetric techniques coupled with ESCA examination. The anodic polarization curve exhibits a well defined peak which corresponds to the formation of Co(OH)<sub>2</sub> or CoO. Further peaks in the transpassive potential region correspond to the electrooxidation of Co(II) species to Co<sub>3</sub>O<sub>4</sub> and CoOOH, respectively. The heights of the anodic peaks increase with the increase of NaOH concentration, temperature and scan rate. In cyclic voltammetry, the reverse scan consistently shows three cathodic peaks which are ascribed to the reduction of CoOOH, Co<sub>3</sub>O<sub>4</sub> and CoO oxides, respectively. ESCA examination confirmed the presence of these oxides in the passive film.

Title:Electrochemical Behaviour of Cobalt in NaOH Solutions
Creators:
Abd El Rehim, Sayed S.
El Basosi, Ahmed A.
El Zein, Salah M.
Osman, Magda M.
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:59
Number:11
Page Range:pp. 2383-2389
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19942383UNSPECIFIED
ID Code:658
Item Type:Article
Deposited On:06 Feb 2009 17:02
Last Modified:06 Feb 2009 16:02

Citation

Abd El Rehim, Sayed S.; El Basosi, Ahmed A.; El Zein, Salah M.; Osman, Magda M. (1994) Electrochemical Behaviour of Cobalt in NaOH Solutions. Collection of Czechoslovak Chemical Communications, 59 (11). pp. 2383-2389. ISSN 0010-0765

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