Contribution of Nafion loading to the activity of catalysts and the performance of PEMFC

Chien Ming Lai, Jing Chie Lin, Fu Ping Ting, San Der Chyou, Kan Lin Hsueh

研究成果: 雜誌貢獻期刊論文同行評審

54 引文 斯高帕斯(Scopus)


Different amounts of Nafion loadings (in the range of 0-2.0 mg cm-2) were added to a catalyst containing 0.5 mg cm-2 of Pt; these were prepared by spraying a Nafion solution on an electrode surface. The effect of Nafion loading on the activity of the catalyst and the performance of a proton exchange membrane fuel cell (PEMFC) was investigated by using electrochemical methods such as direct current polarization (using an I-V curve), electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and linear scan voltammetry (LSV). The results of the I-V and EIS were compared in order to resolve the ohmic resistance (RΩ, calculated from the I-V curve) into interfacial and internal resistances (Rif and Rs, simulated from the EIS). The analysis of the electrochemical data revealed that the interfacial resistance (Rif) is closely related to the reactive region of three-phase zones (interfaces among the reactants, electrolyte and catalyst), and it provides a major parameter for diagnosing the activity of the catalysts and the performance of the PEMFC.

頁(從 - 到)4132-4137
期刊International Journal of Hydrogen Energy
出版狀態已出版 - 8月 2008


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