very clear explanation! Can this technique be used to establish the optimum current density for electroplating? We are currently looking at plating Co onto SS316 (for recovery from LithiumCoOxide cathodes from lithium batteries) but test runs using an MMO anode suggests that there is competition between plating and hydrogen evolution.
Is the electrode Ferrocene? What would happen if you have gold as the anode, an oxygen ion conductor as the electrolyte and at the cathode Ruthenium? I was wondering if we would see both Au and Ru at the CV graph. Thanks a lot.
10:41 When I do CV on my samples, the peaks are consistently around 0.2-0.4V apart (depending on solution concentration) and is a reversible reaction. How would that be translated to the 0.059/n volts part of the Nernst equation? What does n < 1 even mean or can it be possible? How many electrons are being transferred during oxidation/reduction at each point?
The 59/n mV is only for ideal situations. In many cases, your experimental set-up might have uncompensated resistance or other reasons that electron transfer to and from your electrode to your molecule might be slow, leading to wider peak separation. If you're running CV in organic solvents, some solvents in particular like THF might also show higher peak separations compared to solvents like acetonitrile.
In the initial E(t) graph could someone explain why the time when the maximum voltage is reached is ,,lambda" and when the potential is reversed and reaches the initial value on the time axis is ,,lambda/2"? I think if the scan rate of the applied voltage is constant the two periods to be equal and, therefore, the maximum voltage value is reached at ,,lambda/2" point. On the other hand, thanks a lot for your informations and I am waiting your future videos with explanations about cyclic voltammetry!
Hello everyone! I have a question about CV. It is known that current in CV depends on different controlling mechanisms: at low potentials before peak current there is surface control and after - diffusion control. Also it is known that changing of sweep speed give us information about surface or diffusion limitation of our reaction. But i cannot understand how type of limitation of our reaction connected with CV limitations at different potentials...
Can anyone explain at 10:22, why detla E = Eanodic - E cathodic instead of Ecathodic - Eanodic as it is is in Electrochemical cell potentials? Is it as simple has because we are pumping energy in ? As in electrolytic vs galvanic?
Because in this case the anodic peak is at a higher potential than the cathodic peak. I’m pretty sure it’s just for the sake of keeping the value a positive number. And we aren’t really pumping in anything, it’s sort of like cooking. Some things just won’t cook unless they reach a certain temperature, same way that some things won’t oxidize/reduce unless they reach a certain voltage, which can be positive or negative
Hello Mam, this is a very informative lecture. I really liked it. I have a question - you have mentioned that "Never Stir" at 4 min 53 secs, what does it mean? Why not stir?
What happens if you do not sweep the potential up to the value in t=lambda? Let's say you increase for example to a value lower than E_p,a, does this mean that no electrochemical reaction happened and you would go back following the same path upon decreasing of the voltage? If anyone knows, thanks!
I'm not sure about this but I think you would build up a capacitive current and when going back you would take another path that would nearly the same as the double layer is decaying. But maybe I'm wrong. Good luck finding the right answer, or if you have the opportunity just measure a material yourself and try it out.
You're literally saving my grades ma'am. Big big respects! Thank you so much!!!!!!!!
Thanks Emily. No one has ever taught me such brief and artistic presentations on Electrochemistry. You have done a great Job. I salute....
You're a godsend, never stop. Content on this work is limited on RUclips
Awesomely presented and very well and precise explanation, thank you very much !
Hey Emily, i really liked your way how to explain this topic. Thanks a lot for that.
Awesome presentation. So clear and easy and pleasant. Thank You
OMG such a great explanation!!! Thank you so much!
So easy and pleasant to understand! Thank you
AMAZING! Really nicely explained, thank you!
Efficiently explained. Welldone appreciated !
Thank You Professor, Your videos are very Helpful.
ur teaching is totally wonderful, thx
Outstanding lecture -- excellence
Great, Nice Explanation. can you make more videos on Cyclic voltammetry demos as you said.
Can you please some videos on Impedance.
great respect for this lady teacher...
Keep up the good work!
thanks for the class, great explanation.
You are awesome teacher!
Thanks alot for helping us 🥺❤
Great, would you please upload more videos on electrochemistry measurement. Thanks
Thank you 🙏 Emily ❤
Excellent video
Excellent teaching ma'am
LOVE THIS VIDEO! Thanks a lot kk
Beautifully explained (L) I love you Emily
It was really informative
This is great, my research related to this stuff. Fix, I must subscribe ur channel
very clear explanation! Can this technique be used to establish the optimum current density for electroplating? We are currently looking at plating Co onto SS316 (for recovery from LithiumCoOxide cathodes from lithium batteries) but test runs using an MMO anode suggests that there is competition between plating and hydrogen evolution.
Thank you
Thank you so much😊
Thanks, Emily
How do you write so well backwards?? Haha
Thanks so much for this explanation
She likely writes "normally" from her perspective then just flip the image before uploading the video ;)
Is the electrode Ferrocene? What would happen if you have gold as the anode, an oxygen ion conductor as the electrolyte and at the cathode Ruthenium? I was wondering if we would see both Au and Ru at the CV graph. Thanks a lot.
Great
Can u please share ur reference material or books?
thank you for making informative videos🔥
Can you please do the same for EIS
you are smart and very cute and lovely, thank you
10:41 When I do CV on my samples, the peaks are consistently around 0.2-0.4V apart (depending on solution concentration) and is a reversible reaction. How would that be translated to the 0.059/n volts part of the Nernst equation? What does n < 1 even mean or can it be possible? How many electrons are being transferred during oxidation/reduction at each point?
The 59/n mV is only for ideal situations. In many cases, your experimental set-up might have uncompensated resistance or other reasons that electron transfer to and from your electrode to your molecule might be slow, leading to wider peak separation. If you're running CV in organic solvents, some solvents in particular like THF might also show higher peak separations compared to solvents like acetonitrile.
In the initial E(t) graph could someone explain why the time when the maximum voltage is reached is ,,lambda" and when the potential is reversed and reaches the initial value on the time axis is ,,lambda/2"? I think if the scan rate of the applied voltage is constant the two periods to be equal and, therefore, the maximum voltage value is reached at ,,lambda/2" point.
On the other hand, thanks a lot for your informations and I am waiting your future videos with explanations about cyclic voltammetry!
Oh yes, sorry, I made a mistake! You're absolutely right.
Mam can u please tell how to calculate electro active surface area of modified electrode in relation to bare electrode? By ip vs scan rate root plot
hi how are you?i made potensiostat but i have some problems ..thats about swv cycle do you know how is it?itsfull cycle like cv or half?
Can you please explain what board you are using to make this video? I love the presentation. It's a really neat interface. It is a digital whiteboard?
Hello everyone! I have a question about CV. It is known that current in CV depends on different controlling mechanisms: at low potentials before peak current there is surface control and after - diffusion control. Also it is known that changing of sweep speed give us information about surface or diffusion limitation of our reaction. But i cannot understand how type of limitation of our reaction connected with CV limitations at different potentials...
Can anyone explain at 10:22, why detla E = Eanodic - E cathodic instead of Ecathodic - Eanodic
as it is is in Electrochemical cell potentials?
Is it as simple has because we are pumping energy in ? As in electrolytic vs galvanic?
Because in this case the anodic peak is at a higher potential than the cathodic peak. I’m pretty sure it’s just for the sake of keeping the value a positive number.
And we aren’t really pumping in anything, it’s sort of like cooking. Some things just won’t cook unless they reach a certain temperature, same way that some things won’t oxidize/reduce unless they reach a certain voltage, which can be positive or negative
Hello Mam, this is a very informative lecture. I really liked it. I have a question - you have mentioned that "Never Stir" at 4 min 53 secs, what does it mean? Why not stir?
Since diffusion is the best way for the analyte to make its way to the surface of the electrode you don’t want to disturb the solution and hamper it
Nice work. I want to contact with you!
Which institution does she teach at?
我哪怕早半年订阅这个频道，考研物化也不致于这么低😂还好上岸了
So no one is talking how she’s literally writing backwards fluently 😯
The image feed is mirrored onto the camera
What happens if you do not sweep the potential up to the value in t=lambda? Let's say you increase for example to a value lower than E_p,a, does this mean that no electrochemical reaction happened and you would go back following the same path upon decreasing of the voltage? If anyone knows, thanks!
I'm not sure about this but I think you would build up a capacitive current and when going back you would take another path that would nearly the same as the double layer is decaying. But maybe I'm wrong. Good luck finding the right answer, or if you have the opportunity just measure a material yourself and try it out.
Bra. She's writing backwards.
Thank you