Thank you for your answer, I have tried to use two potentiostats but unfortunately as I connect the working electrode (Clip) of the second potentiostat with the working electrode current value abruptly increase. I don't know what is wrong

I think that the problem with your system is that second potentiostat makes your CE to WE and that is why your current value makes strange things.

On the other hand, if you don't have a modern potentiostat, you can use a multimeter to connect a RE to your CE and read its potential value.

I think the comment of Jordi is right - if you want to measure the potential correctly, it has to be done under "open circuit" conditions in the second loop. Otherwise, if the potentiostatic circuit is closed, the former CE will be WE of the second circuit, and thus additional currents are flowing in two separate, but cross-linked circuits. Even a second reference electrode may induce a coupling. Kind regards, Dirk

Thank you Jordi and Dirk  for your answers. If you can little elaborate your answers I will be thankful to you.

Regards

You are using two potentiostats, aren't you?. Ok, then, for your first potentiostat your working electrode is, for example, Au, your RE Ag/AgCl and your CE is made of Pt. Then, you stablish a constant potential electrode to your pair WE-RE and a current i(t) is established.

Afterwards, you connect another RE (RE-2) to your Pt electrode. Therefore the second potentiostat recognize the Pt electrode as your W.E and your Ag electrode as your C.E. This fact generates another current between them.

If your potentiostat is not able to connect two R.E at the same time, I suggest you to connect your CE and the RE-2 to a multimeter and record the potential values that it will show.

If you explain your doubts with more detail, I'll try to answer them clearer.

For the time being I am using two potentiostat and only one RE for both potentiostat. I give constant potential from potentiostat A to my working electrode and record i-t curve while I connect second potentiostat B to record the potential on CE. For Potentiostat B the CE. The RE is common for both potentiostats. But when I connect potentiostat B strange current value appears on Potentiostat A.

Dear Aamir,

It is hard to say that but your system is not correctly connected. If you connect your electrodes in that way you are copying the first system at the second potentiostat and that's probably why you don't obtain good results.

First of all, if you want to measure the electrode potential of your CE you need to use a different RE from that used to measure the potential of your WE. Second, I suggest you to check if your potentiostat accepts two reference electrodes and, If not you should use a multimeter. In my opinion, the use of a second potentiostat is unnecessary and, probably, it is the source of your measuring problems.

Respected Jordi,

Thank you for your effort. Actually, I want to record V-t curve while measuring the potential from second potentiostat. I know there is problem with connection thats what I want to solve.

When I use the second potentiostat I want to use it as a voltmeter. For the second potentiostat (Voltmeter) I consider CE as WE and measure the potential of that CE with respect to RE.

Respected Christian Punckt,

That is what I am making mistake. The Potentiostat B i am using has WE that is also connected to Ground. I will change the potentiostat But if you elaborate your anwer and give me the reason I will be very thankful to you

Best Regards

Respected Reseachers,

I couldnot solve my problem If some one has any other suggestion please add answer.

Kind Regards

A Shah

Are you still using two potentiostats?

I suggest you to use only one and to measure the electrode potential of your CE, use a multimeter connected between your CE and a second RE.

I think that your problem is also using the same RE to measure both WE and CE potentials.

I fully agree with Jordi - using two separated potentiostats in one circuit with identical electrodes will in any case cause troubles!

I have to recoed V-t curve of counter electrode s it is must for me to use second potentiostat. But can you please explain why one RE may has some issues?

because the RE determines the potential difference between the WE and it. If you also add the CE, the potential difference won't be related to WE nor CE. Then, you have to use a different RE to measure the V-t curve for your CE.