Dear Colleagues
I am currently studying Platinum Group Metals thin film coatings (on non-noble metals) working as auxiliary electrodes. The goal is to develop an alternative to bulky platinum wires and meshes for electrochemical measurements.
I would like to asses cyclic stability (durability) of these electrodes in various electrolytes using potentiostatic techniques (not galwanostatic). As these electrodes have a high area, the recorded currents (Cyclic Voltammetry against graphite rod as CE and Ag/AgCl as RE) in 3-electrode setups are too high to be measured. What approach would you recommend?
Hello,
2 solutions : Decrease the size of your electrode or add a current booster to your potentiostat to increase the current in the cell.
In my point of view, the first solution is the best. If your surface is smaller, you will be able to measure the current!
Let me know if you need more information...
Regards
Thomas
Dive a small percentage (sliding: 1% to a safe%) height of your piloting WE (alternative to Pt-wires), only, in your electrolyte, so that your maximum cell current confines wise in the range(s)[1] of your potentiostat's currents (to be measured).
1. If you start dip-sliding the WE from 1% (height), then more, than one, current range(s) might be safeguarded (and rewarding) for your potentiostat and your tests (for alternatives to Pt-wires).
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