A single
PEMFC was assembled with a commercial membrane electrode
assembly (MEA, GORE™), gas diffusion layer (GDL),
graphite bipolar plates, and aluminum end plates. The active
area of the MEA was 5 5 cm2; Pt loading in the catalyst layer
was 0.4 mg cm2. The MEA of the single cell was activated at
0.4 V for 24 h in a hydrogen and air atmosphere (1:2) with 100%
relative humidity.