Currently, I’m working on electrochemical water splitting, specifically focusing on the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). I want to know how I choose appropriate values of applied potential or applied current in chronopotentiometry and chronoamperometry analyses to assess the stability of electrode materials involved in electrochemical HER, OER, and overall water splitting. Should I use a specific value of applied potential/applied current, or can I choose it randomly? For reference, I have attached the linear sweep voltammetry (LSV) curve, which I intend to utilize for stability testing purposes.
I guess the stability of the electrode material depends on current passed through the electrode and by consequence oxygen / hydrogen evolution. I would test the electrode at different preset current densities (steps of 10 mA/cm2). So work galvanostatic / chronoaperometry ... potential changes will indicate a change of surface conditions. Take into account that the solution/film at the electrode can be strong acidic (O2) or alkaline (H2) if your electrolyte is not buffered.
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