Potential difference refers to the voltage difference between the electrodes during electrolysis. Controlling the potential difference is crucial for the quality of tellurium deposition. Below are some key electrode potential data relevant to tellurium electrolysis:
Te 4+ +4e− →Te
Standard Electrode Potential: Approximately +0.55 V (relative to the Standard Hydrogen Electrode, SHE)
Tellurium Oxidation Reaction:
Te→Te4+ +4e−Te→Te 4+ +4e −
Standard Electrode Potential: Approximately -0.55 V (relative to SHE)
Impurity Element Electrode Potentials:
Copper (Cu) Reduction Reaction:
Cu2++2e−→Cu
Standard Electrode Potential: +0.34 V (relative to SHE)
Silver (Ag) Reduction Reaction:
Ag++e−→Ag
Standard Electrode Potential: +0.80 V (relative to SHE)
Zinc (Zn) Reduction Reaction:
Zn2++2e−→ZnZn 2+ +2e − →Zn
Standard Electrode Potential: -0.76 V (relative to SHE)
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