The pH value of this simulated solution was 3.35,
that is close to the fuel cell environment [34]. The strong acid solution
used in this study also consists of 98% H2SO4 and 48% HF
diluted in de-ionized water. The final composition is 1.0 M H2SO4,
1.8 ppm HF, and de-ionized water. An acetic acid solution with pH
of 5.0 was employed as weak acid.