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

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.