For x < 1: The oxidation current decreases linearly as the BF₃-CH3CN concentration approaches 1 equivalent relative to TEMPO, indicating a decline in the concentration of TEMPO radicals. At the same time, the reduction current decreases at a rate three times slower than the drop in the oxidation current. This behavior is likely due to the partial oxidation of TEMPO radicals into TEMPO⁺ and the formation of non-redox species (TEMPO-X), which diminishes the system's overall electroactivity. This trend can be described by the following relation: