Figure 3. Fuel cell performance in CO and in gasified carbon.

(a) Terminal voltages measured at 750 °C as a function of time for the cells with and without BaO/Ni interfaces operated at a constant current density of 500 mA cm⁻² with wet CO (with ~3 v% H2O) as the fuel. (b) Typical current–voltage characteristics and the corresponding power densities measured at 750 °C for cells with and without BaO/Ni interfaces (after 4 h operation) when wet CO was used as the fuel and ambient air as the oxidant. (c) Typical current–voltage characteristics and the corresponding power densities measured at 850 and 750 °C for cells with BaO/Ni interfaces when gasified carbon was used as the fuel and ambient air as the oxidant in a fluidized carbon bed-SOFC arrangement.