Corrosion in PEFCs from Hydrogen Depletion

Carbon Corrosion in PEFCs from Hydrogen Depletion Preliminary Remarks... 

Qualitatively, this picture is analogous to carbon corrosion on the cathode side in the hydrogen-depleted region of a PEM fuel cell discussed in the section Carbon Corrosion in PEFCs from Hydrogen Depletion. The major difference is that in PEFC, hydrogen depletion causes reversal of the depleted domain due to the presence of oxygen on the anode side. In DMFC, no reversal happens, the anode in the MD-domain continues generating protons, but the source of these protons is CCR. 

The right-hand side of Equation 5.237 is the proton current density f, produced in the ACL, minus the proton current density f consumed in the CCL. In this section, our goal is to demonstrate the effect due to the dead spot, and all transport losses on either side of the cell will be ignored. If necessary, transport losses in the GDL can be taken into account, as described in the section Carbon Corrosion in PEFCs from Hydrogen Depletion, while the transport losses in the CLs can be accounted for, using equations of Chapter 4. 

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