Abstract
The reduction of technetium(VII) at mercury electrodes in acidic media yields three-valent technetium as the product of the first totally irreversible step. Polarography, chronopotentiometry, chronoamperometry, linear-sweep, and steady-state polarization techniques were used to obtain electrode kinetic parameters for the first stage of the reduction. Reduction of pertechnetate was of first order with respect to TcO 4 −, and of second order with respect to hydrogen ion in the rate determining step. On the basis of diagnostic criteria, a mechanism was proposed which serves to explain the effects of some important variables on the electrochemical behavior of technetium.
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