I am about to conduct a photocurrent analysis on my synthesized catalysts, but I have no idea about the appropriate potential that needs to be applied to obtain accurate photocurrent measurements.
Hai Dear Atiyeh Karkhaneh Jafary, I hope this will help to you
The proper potential for photocurrent analysis depends on the type of catalysis and the materials involved. In general, the potential should be chosen so that the photoexcited electrons can be injected into the conduction band of the semiconductor, but not so high that they are immediately lost to recombination. The exact potential will need to be determined experimentally for each system.
For example, in the case of photoelectrochemical water splitting, the potential should be chosen so that the photoexcited electrons can be injected into the conduction band of the semiconductor, but not so high that they are immediately lost to recombination with the holes in the valence band. The potential will also need to be high enough to oxidize water, but not so high that it causes the semiconductor to degrade.
The potential required for photocurrent analysis can also change depending on the catalyst used. For example, in the case of the oxygen evolution reaction, the potential required for a ruthenium catalyst is different from the potential required for a cobalt catalyst.
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