Two step electrochemical redox mechanism of Cu2+ through kinetic parameters and digital simulation technique | [Mehran University Research Journal of Engineering and Technology • 2023]

Author(s):

1. Obaid Khaliq: Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal,Science Campus, Karachi- 75300,Pakistan

2. Iftikhar Ahmad Tahiri: Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal,Science Campus, Karachi- 75300,Pakistan

3. Haji Muhammad: Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal,Science Campus, Karachi- 75300,Pakistan

4. Shaikh Mohiuddin: Department of Chemistry, University of Karachi,Karachi-75300,Pakistan

5. Muhammad Hashim Zuberi: Department of Environmental sciences, Sindh Madressatul Islam University,Karachi-74000,Pakistan

6. Syed Tahir Ali: Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal,Science Campus, Karachi- 75300,Pakistan

7. Kousar Yasmeen: Department of Chemistry, Federal Urdu University of Arts, Sciences and Technology, Gulshan-e-Iqbal,Science Campus, Karachi- 75300,Pakistan

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 ( 0) confirmed the quasi-reversible response of (Cu2+/Cu+) redox couple. The experimental Gileadi ( 0) and simulated Digi Sim ( 0) 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 quasireversible response of (Cu2+/Cu+) through obtained electrochemical and kinetic parameters by using simple, fast, and cost-effective technique.

Page(s): 155-163

DOI: 10.22581/muet1982.2304.2885

Published: Journal: Mehran University Research Journal of Engineering and Technology, Volume: 42, Issue: 4, Year: 2023

Keywords:

Cyclic Voltammetry EE Mechanism Mass Transfer Coefficient Quasi Reversibility Convolution Voltammetry DIGISIM

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