Effect of the Nafion content in the {MPL} on the catalytic activity of the Pt/C-Nafion electrode prepared by pulsed electrophoresis deposition

By Adilbish, Ganpurev; Yu, Yeon-Tae
Published in International Journal of Hydrogen Energy NULL 2017

Abstract

Abstract The aim of this work is to study the effect of Nafion content in the microporous layer (MPL) on the electrophoretically deposited Pt/C-Nafion electrode performance. First, the {MPLs} are prepared with different Nafion ionomer contents (5, 10, 20, 30 and 40 wt%) on the carbon paper substrates. Next, Pt/C-Nafion electrodes are prepared by pulsed electrophoresis deposition (pulsed EPD) from a Pt colloidal solution as a plating bath. The catalytic activities of the prepared Pt/C-Nafion electrodes are evaluated using the cyclic voltammetry (CV) technique for hydrogen oxidation reaction (HOR). Also, a {PEMFC} single cell test is carried out using the Pt/C-Nafion electrodes prepared with the pulsed {EPD} method as a cathode. The mass-specific power density for the Pt/C-30wt% Nafion electrode is 1578.8 mW mg Pt ? 1 , which is higher than the rest of the Pt/C-Nafion electrodes. The Nafion content in the cathode {MPL} should affect the performance of the PEMFC, especially at a high current density.

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