Hi everyone.
I am investigating the transition metal oxides as cathode materials for catalyzing oxygen reduction reaction (ORR) at room temperature. The degeneration of cathodes occurred. I also noticed that some reports said Pt as a cathode would dissolve during the catalysis process. But I want to know what is the main reason ?
The main reason for Pt dissolution or transition metal oxides degradation?
Yes. If possible, I want to know that is there any research focused on this topic (especially on oxides degradation)
As you are studying reduction of oxygen, I think the overvoltage is relatively low, therefore no possibility of hydrogen fragilization. I think this is due to the chemical instability of your electrode materials in the environment of study. Generally, in electrosynthesis, we use DSA electrodes (oxides based on transition metals of groups IVB and VB) stable in aggressive environments.
What kind of "degeneration" did you observe?
Pt dissolution as cathode is very unusual, at least...
Would this be of any use to you? It suggests that OH radicals might be the cause of cathodic dissolution.
Article Dissolution of Pt at Moderately Negative Potentials during O...
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