I did RDE for an SnBi system, but there is no change when I increase rpm. How do I use RDE for an alloy system?
Rotating ring disc anode experiments make sense if you expect dissolved or corroded species in the solution - by the rotation of the electrode, the dissolved species are transported away from the electrode surface and an accumulation is prevented. So if you do not employ a ring-disc electrode with additional potential possibilities to detect (scan) the dissolved species and measure their reaction potentials, the speed of your electrode has simply to above a certain value to make the transport working ... That's in principle all. Best regards, Dirk
Can you try to make a simple cyclic voltammetry experiment and check if you have any signal?, if you have any corresponding signal, then it is advisable to revise the RDE experiment setting. Do you expect to have any redox or electron transfer reaction from your system?
Dear Adel Attia, yes my alloy system shows redox signal. here i have attached CV for SnIn alloy system.
First look the current is very high, what is the area of the WE you are using in the CV experiment compared to the RDE experiment, what is the RE and the electrolyte you are using please?
copper is a WE, area for CV experiment 0.4 cm2 & for RDE experiment area 5 mm dia. Electrolyte is tin(IV) chloride and Indium (III) chloride in acid bath.
I did not get the RE, if it is Ag wire, then try to have a scan rate of about 10 mV/s, you start with reduction first. What is the concentration of both tin IV and indium III chloride, please?, I was thinking that the WE is the SnBi, try to clean the Cu WE to be sure it is blocked by any film or deposit. Other suggestion, try to use the RDE in tin IV first (no indium III chloride). Can you send the CV of the RDE to have a look. Cheers.
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