There is no single "standard electrode potential" for sulfur. This is because sulfur can exist in multiple oxidation states and forms a variety of different compounds.

To determine the standard electrode potential, you need to specify the specific reaction involving sulfur.

Here are a few examples:

* Sulfur to sulfide: S + 2e⁻ → S²⁻ E° = -0.14 V (This is the standard electrode potential for the reduction of sulfur to sulfide)

* Sulfur to sulfate: S + 4H₂O → SO₄²⁻ + 8H⁺ + 8e⁻ E° = +0.17 V (This is the standard electrode potential for the oxidation of sulfur to sulfate)

Therefore, the standard electrode potential of sulfur depends on the specific reaction you're interested in.