Cathode of the fuel cell with polymer electrolyte (nafion): active layer and estimated degree of platinum utilization

It is hypothesized that a fractal nafion film is formed on the pore surface of the platinum carrier grain in the process of manufacturing the catalyst ink that form the active layer. This film is capable of increasing significantly the degree of platinum utilization. The process of nafion penetration into pores of the carrier grain is simulated on a computer. The factors that allow a high degree of platinum utilization to be obtained are established. The results of computer calculations are in agreement with experimental estimates of the degree of platinum utilization.