The Contamination Effects of Multi-contaminants

As discussed above, currently the modeling work on PEMFC contamination is mainly focused on the anode side. The only work on cathode catalyst modeling was published by Knight et al. [21], who presented an equation to fit the fuel eell performance caused by NO2 and SO2 contamination at the eathode, as shown in Equation 6.26 [21]  

Obviously, E is the eell voltage, Eo is the theoretical cell voltage, I is the current density, bi is the Tafel slope, C is the contaminant concentration, and R is the membrane resistanee. However, the physical meaning of the other parameters was not given. Most possibly, these are kinetie parameters related to NO2 and SO2 adsorption on the Pt surfaee. 

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