When a Bimetallic pair such as Au-Pt comes in contact with an electroactive species, a potential is induced between the electrode surface and the far-field bulk, I have successfully applied techniques such as CV, LSV and chronoamperometry to study the diffusion and reaction kinetics.
But I'm more interested in studying/measuring the induced potential in relation with surface reaction (Damkholers number) when the bimetallic system (Au/Pt) acting as a complete circuit, comes into contact with an electrolyte e.g H2O2.
I'm thinking about Open circuit potential (OCP), but are there other techniques I can use ?
I'm not entirely sure, but ZRA mode testing may be ideal for that. In that case you would have separate Au and Pt electrodes which are shorted through a ZRA (most potentiostats have a ZRA mode). In addition to measuring any current flowing you would also be able to measure the potential of the couple relative to a reference electrode in solution. You should be getting the same info as you would with OCP but with the added measurement of the current flowing between the two metals which you cannot get directly from the bimetallic electrode.
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