Ir depends. What metal do you want to deposit? Besides, what is the material of your electrode? Is it platinum, graphite, gold or ...?

Electrodeposition coatings are initiated by the electrolysis of water, which makes the current flow possible and starts the process. The reduction of water occurs at the cathode and the oxidation of water occurs at the anode.

In anodic deposition, the material being deposited will have salts of an acid as the charge bearing group. These negatively charged anions react with the positively charged hydrogen ions (protons) which are being produced at the anode by the electrolysis of water to reform the original acid. The fully protonated acid carries no charge (charge destruction) and is less soluble in water, and may precipitate out of the water onto the anode.

The analogous situation occurs in cathodic deposition except that the material being deposited will have salts of a base as the charge bearing group. If the salt of the base has been formed by protonation of the base, the protonated base will react with the hydroxyl ions being formed by electrolysis of water to yield the neutral charged base (again charge destruction) and water. The uncharged polymer is less soluble in water than it was when was charged, and precipitation onto the cathode occurs.

You can search in this paper:

3.1 Electroless Plating of Pd Binary and Ternary Alloys and Surface Characteristics for Application in Hydrogen Separation - ScienceDirect

Mahdi Ghamsari Thank you for answer. I am using Ag as electrode and want to deposit Cu on top of Ag working electrode.

Seyed Mojtaba Mostafavi excuse me dr.do you have any information about electrolees plating?i whant to deposite copper on plastic !deposit confirm but didnt on plastic!if u have any information can l have youre email?thanks a lot