Abstract
Preparation of catalyst layer in PEMFC electrodes was investigated. Toray carbon paper was used as diffusion layer, and Johnson–Matthey 20% Pt/C was employed as catalyst. Electrode contains neither PTFE nor carbon powder. The optimal catalyst layer composition was discovered by orthogonal test method, with the use of cell voltage–current curve and cyclic voltammogram curve. The optimal amount of the Nafion (ionomer) in the catalyst layer was found to be 1.4 mg / cm 2 when Pt loading was kept at 0.4 mg / cm 2 . Power density of PEMFC achieved 0.37 W / cm 2 with air and H 2 were used at the outlet pressure of 0.1 MPa.
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