How does concentration and stirring affect decomposition potential?

[Reimu]

Homework Statement

Decomposition potential can be affected by the concentration of sulphuric acid electrolyte and whether there is stirring. Explain how they affects.

Homework Equations

E_D = E_cathode - E_anode + ɳ
where ɳ is the overpotential

The Attempt at a Solution

I'm thinking that the decomposition potential here is referred to the experimental decomposition potential since overpotential is involved.
Also, I think that the increase in concentration of the acid reduces the concentration polarisation same goes for stirring but I'm not sure whether I'm correct and I need help in linking back to decomposition potential

 

[Bystander]

Decomposition of WHAT? Can you write a reaction for the decomposition? Where in that reaction might sulfuric acid (or some species derived from sulfuric acid) appear, or have an effect?