Mass Spectrometry of Polymer Electrolyte Membrane Fuel Cells

Figure 4

Correlation between current density generated by fuel cell and CO₂ production at its anode for various fuel concentrations between 0.25 and 10 M (methanol) and 0.25 and 14 M (ethanol); total flow rate was 25 sccm. The color intensity of experimental points reflects the fuel density. Blue dashed line represents complete conversion of alcohol molecule to CO₂. Inset: current density of the methanol-fed FC at 150 mV as a function of fuel molarity.