Dear Oussama Khiter ,

illustrate your cell (thoroughly, and the substrate).

thank you very much Dear Ioannis Samaras , here i am using fly-ash activated carbon coated on a graphite sheet as an electrode, and 1M of KOH as an electrolyte.

Dear Oussama Khiter ,

so, we can find, actually, two[1]-WEs: 1)fly-ash, and/on 2)gr-sheet, the substrate.

What is the CE (and the RE) ?

Recommendation: Try a CVL and/or an EIS (as diagnostic tests), and/or a new GCD under a much lower-i (i

Dear Ioannis Samaras ,

thank you very much, i will redo tests.