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Research articles

ScienceAsia 42(2016): 114-120 |doi: 10.2306/scienceasia1513-1874.2016.42.114

Electrochemical behaviour of copper(II) at a hanging mercury drop electrode

Ahmed A. Al-Owaisa, Ibrahim S. El-Hallagb,*

ABSTRACT:     The electrochemical properties of Cu(II) ions were studied in 0.1 M KNO3 at a hanging mercury drop electrode using cyclic and convolutive voltammetry in addition to chronoamperometry and chronopotentiometry methods. The Cu(II) ions consumed two electrons in two steps to form monovalent Cu(I) ions and Cu metal followed by a process of amalgam formation. The rates of both electron transfer steps were found to be quasi-reversible. Digital simulation was used to verify the electrode pathway and to determine and confirm the electrochemical parameters of the reductive process of bivalent Cu(II) ions.

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a Chemistry Department, Faculty of Science, King Saud University, Riyadh, Saudi Arabia
b Chemistry Department, Faculty of Science, Tanta University, Tanta 31527, Egypt

* Corresponding author, E-mail: i.elhallag@yahoo.com

Received 18 Nov 2014, Accepted 0 0000