2. Experimental
2.1. Preparation of the MEA using the decal transfer
method
Polymer electrolyte membranes (Nafion 115, DuPont) were
pre-treated to obliterate any organic or inorganic impurities
before use in MEA preparation. The treatment process was
carried out sequentially by boiling the membranes in deionized
water followed by washing with a 3 wt.% hydrogen
peroxide, a 1.0Msulfuric acid, and de-ionized water. Each step
was conducted at 80 C for 1 h and the treated membranes
were stored in de-ionized water prior to use.