Two step electrochemical redox mechanism of cu2+ through kinetic parameters and digital simulation technique

Obaid Khaliq; Iftikhar Ahmad Tahiri; Haji Muhammad; Shaikh Mohiuddin; Muhammad Hashim Zuberi; Syed Tahir Ali; Kousar yasmeen

doi:10.22581/muet1982.2304.2885

Obaid Khaliq Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal, Science Campus, Karachi-75300, Pakistan
Iftikhar Ahmad Tahiri Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal, Science Campus, Karachi-75300, Pakistan
Haji Muhammad Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal, Science Campus, Karachi-75300, Pakistan
Shaikh Mohiuddin Department of Chemistry, University of Karachi, Karachi-75300, Pakistan
Muhammad Hashim Zuberi Department of Environmental sciences, Sindh Madressatul Islam University, Karachi, Pakistan
Syed Tahir Ali Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal, Science Campus, Karachi-75300, Pakistan
Kousar yasmeen Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal, Science Campus, Karachi-75300, Pakistan

DOI: https://doi.org/10.22581/muet1982.2304.2885

Keywords: Cyclic voltammetery, EE mechanism, Mass transfer coefficient, Quasi reversibility, Convolution voltammetery, DIGISIM

Abstract

Cycle voltammetric behaviour of Cu(II)SO₄ in aqueous NaCl (supporting electrolyte) has been explored in comprehensive manner. 5 mM Cu²⁺, 1.0 M NaCl and glass carbon (GC) reveals the optimum response. Two stage electromechanical redox EE mechanism [(Cu²⁺/Cu⁺) and (Cu⁺/ Cu⁰)] has been explored by using different theoretical and experimental methods. The mass transfer co-efficient, dimensionless parameters and heterogeneous electron transfer rate constant ( confirmed the quasi-reversible response of (Cu²⁺/Cu⁺) redox couple. The experimental Gileadi ( and simulated Digi Sim ( values found as 0.052 cm/s and 0.0012 cm/s respectively. The diffusion co-efficient (D) of (Cu²⁺/Cu⁺) redox couple computed from 9.96 X 10^-6 to 4.43 X 10^-6 cm²/s through different methods. The novelty of the present work is to confirm the quasi-reversible response of (Cu²⁺/Cu⁺) through obtained electrochemical and kinetic parameters by using simple, fast, and cost-effective technique.