Answer Happy

I would like to learn more about the failure modes of fuel cells
upon exposure to contamination at the cathode side. Specifically, I
would like to better understand the ripple effects it might have on
the overall product which is using the fuel cell as a power source,
and solutions to avoid exposure to contaminants
Explain briefly these following questions(answer in detail
please ,I have to make presentation on this so..)
1) Failure modes of fuel cells upon exposure to contamination at
the cathode side
2) Effects of contamination at the cathode side on the fuel cell
powered products
3) Protective solutions to avoid the exposure to
contaminants
4) Permanent solutions to avoid the contaminants