I am working on a bifunctional catalyst for the zinc-air battery system. The catalyst is a ferrite and carbon composite. While measuring ORR activity, sometimes I see a peak in the LSV plot. For the same sample from the same dispersion, I did two LSVs. One measurement has a peak; in the other, it is not. What is the probable reason for this kind of behavior? Figure attached. Thanks
Thank you for the input. Yes, I record the CV at zero rpm. However, I do LSV plots at different rpm (400 to 2500) for the ORR activity test. I did two different drop-casting of the required amount of suspension on a glassy carbon electrode, the above plots ORR 1 and ORR 2, respectively. I see this sharp peak around -0.17V vs Hg/HgO in ORR 2. It may be due to Fe3+ to Fe2+, but it is not in all the recordings.
- Badges
- Science topic