Abstract
The anodic oxidation of telluride ions was studied in using mainly hydrodynamic voltammetry. Thermodynamic (Pourbaix) analyses predicted stepwise oxidation of Te2− to , Te0, , and finally . Consistent with this expectation, was detected as a intermediate product at the ring, both in the forward , and in the reverse electron transfer directions. Studies with authentic samples of in revealed that this species could be collected at the ring both in the oxidative (−0.80V vs. SCE) and in the reduction (−1.20V) modes. Consequently, comparison of the ring response at −0.80V and −1.20V with the disk current profiles in provided further confirmation for the electrochemical generation of the intermediate. Finally, further oxidation of Te0 to and was detected via cyclic and hydrodynamic voltammetry.
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