Episode #77: Review of chemical kinetics

[@jason-t8l-q5n]

Thank you for answering! Really appreciate it. HOR and ORR are merely examples I used to make my question more concrete, no other purposes. Regarding this, I still have some confusion about the coexistence of oxidation and reduction on the electrode. If this is fundamentally possible, it would mean that intense oxidation and reduction reactions can occur simultaneously on the working electrode surface but the net current remains zero in some cases. For example, if +100 mA and -100 mA reactions occur simultaneously on the WE, the net current would be 0. Does this mean the CE is also secretly carrying out two reactions with +100 mA and -100 mA at the same time to supply or accept electrons for the WE? If not, where do the electrons required for the WE’s oxidation and reduction reactions come/go? Hope Neil and Alex can help point out any flaws in my reasoning. Thank you so much!

[@Pineresearch]

This is a great question! We can definitely discuss this topic during our next Ask Us Anything About Electrochemistry Livestream. We'll have a little more time to research the topic and Alex should be back to provide some thoughts.

[@jason-t8l-q5n]

@@Pineresearch Thank you!! I'll join if my schedule permits.

[@Pineresearch]

@@jason-t8l-q5n Sounds good! Even if you can't make it live, we will still answer it and you can watch the video replay any time you need, it will be episode #78.

[@user-xs2er4xg9w]

I have a question related to a research I am measuring the stability of my synthesized electrode ( prepared fresh and one kept for one week ) and I was told the difference between the current readings shouldn’t be more than 2%.. if you have an idea I just want to know why specifically 2% not less or even more. Thanks

[@Pineresearch]

I think regarding a stability study, the person who mentioned a difference of 2% simply thinks the electrode is considered stable when the current doesn't change more than 2%. I believe this 2% is somewhat arbitrary. Your stability study should demonstrate how much it changes over multiple periods of time. But I'm not sure where 2% comes from.