Abstract
Electroreduction of Te(IV) on glassy-carbon and nickel in neutral and weakly alkaline solutions is studied by cyclic voltammetry. A wave for the Te(IV) → Te(0) process is discovered. At a limiting current of Te(IV) reduction in a potentiodynamic mode in 0.5 M Na2SO4, a peak current is observed on Ni at –1.02 V (Ag/AgCl). The relationship between the peak and the tellurium electroreduction to the tellurium ion and the tellurohydrogen formation involving a proton is discussed. Dependence of the peak current on the concentration of Te(IV) ions is used for their analytical assay.
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