What are the electrolyte and pH? Try 10 cycles of CV in the range 1.0-1.5 V with 50 mV/s scan rate.

Thank you for the response, Yurii V Geletii. The electrolyte is 1M KOH and the pH is 13.6. I'll try to see if the CV helps. Can you help me understand what could be the underlying cause of the bump though?

What is the reference electrode?

It looks like the peak represents the oxidation potential at 1.3V. This doesn't matter when you calculate and plot the Tafel plot (since you take the current data at the voltage range where it increases linearly). You can determine the reduction and oxidation potentials through CV measurements.

This is the oxidation of metal/metal oxide to higher oxidation state, for example if you have Ni, NiO or Ni(OH)2 where the Ni is in 0 or +2 state, at this potential the Ni will oxidized to +3 oxidation state (NiOOH). Please see the ref. Article NiCo2O4-based wool-ball as an electrocatalyst for methanol a...

Article Three‐Dimensionally Arranged NiSe2 Nanosheets as an Efficien...

Nabi Ullah Ni is not mentioned as a constituent of the anode material. Your answer is an advertisement of your papers.

Yurii V Geletii Dear sir, i think you didn't read my answer carefully i explain that it might be the oxidation of metal to higher state, and for example i use Nickel as i have experience with Ni and i put my article to support my statement. if my explaination is wrong please correct me with evidence, but i don't know why you criticise me and my article.

I would suggest you please read my answer carefully once again.

Nabi Ullah

Surely I read your post.

"it might be the oxidation of metal to higher state." This is possible, no objections, and is described in details in numerous publications. Then, you switch from the main question to your own work in the area.

"switching from the main problem in a discussion to attract attention to your own work is generally not considered good practice. This approach can be seen as self-serving and may be perceived as disrespectful to others who are actively participating in the discussion of the primary topic [copied from internet]."

Yurii V Geletii

I Think, in both teaching and research practices, it is quite common to first explain a concept, then provide a practical example, and finally include a reference to support the explanation. This structure helps make the reasoning clearer and more accessible. In my response, I first addressed the original question, then shared an example involving Ni, followed by a reference to my own work—which I shared because I have direct experience with it and believe it to be relevant.

Secondly, this is an open platform where sharing knowledge, including personal research and experiences, is encouraged—especially when it helps someone better understand a topic or find a solution. I offered a suggestion, not a directive. It is entirely up to the original poster to decide whether to consider my input or not.

Finally, open discussions thrive on constructive input. If my explanation helps answer the question accurately, then it contributes positively to the conversation. I’m not sure why offering a relevant and substantiated perspective would warrant criticism. If you have an alternative solution or a different interpretation, I would welcome your insights. That way, the discussion becomes more productive for everyone involved.

• Nabi Ullah
• Nasza dyskusja nie dotyczy głównego pytanyia.
• Mrudul Velhal Howdy! It looks like you are not interested in finding the answer to your problem.

Yurii V Geletii Dear Sir, I believe I answered him to the best of my knowledge. It was you who initiated the criticism and took the discussion off-topic. Therefore, I kindly ask you to delete your off-topic messages. and if you have answer for his question just answer him.