Electrochemical characterization
The fuel cell experiments were performed using an optimally
designed apparatus consisting of an alumina ceramic reactor, a
furnace and an electrochemical workstation (NARA Cell-Tech). The
power performance tests were carried out at different temperatures:
750 C, 800 C, 850 C, and 900 C. The reactorwas heated up
at a ramping rate of 5 C min1 up to the desired reaction
temperature. When the temperature reaches up to 600 C from
room temperature, the anode chamber was purged out by flushing
pure Ar gas (99.999%) at a rate of 30 mL min1 to eliminate internal
O2, which could oxidize the fuel. Meanwhile, pure O2 (99.99%) gas
was continuously fed at a rate of 50 mL min1 to the cathode side.