H2PtCl6/Nafion及Pt-C/Nafion溶液製作膜電極組之性能研究

In this study, we prepare membrane electrode assembly(MEA). Using Nafion-212 proton exchange membrane (PEM) and containing Pt-C (Pt deposited on carbon powder support; with 40 wt% Pt content) and chloroplatinic acid catalyst solution. Three different structures of MEAs are prepared including: (1) five layer MEA in which a PEM is located in the middle with two Pt-C catalyst layer being attached on both outside surfaces of the PEM and two gas diffusion layers (GDLs) attaching on the outside surfaces of Pt-C layers; (2) seven layer MEA in which PEM is in the middle of the whole structure with two Pt-C layers on both outside surfaces of the PEM, and two H2PtCl6 reduced Pt particle layers on the outside surfaces of Pt-C layers. We find that the seven layer MEA with total Pt loadings of 0.2 mg/cm2 at anode and 0.4 mg/cm2 at cathode has a best fuel cell performance.