Optimization of PtLa/C Catalysts for Enhanced Performance in Proton Exchange Membrane Fuel Cells: Synthesis and Analysis

Abstract

This study presents a comprehensive investigation into the synthesis and performance analysis of membrane electrode assemblies (MEAs) for proton exchange membrane (PEM) fuel cells. Catalysts were synthesized using a precipitation method, featuring a 16% mass metal load and 84% carbon black. The MEAs were fabricated through a hot pressing method, incorporating Nafion membranes between gas diffusion layers for the anode and cathode.

Performance analyses focused on MEAs with varied Pt and La loadings on the anode side, maintaining a 0.005 mgPt/cm² loading on the cathode. Experiments explored the influence of humidification temperature, cell temperature, and gas flow rates on MEA performance.

Results indicated that higher humidification temperatures improved performance, with minimal variance between 60% and 80% humidity. Lower operating temperatures (40 ºC) yielded higher current density and power density compared to higher temperatures (60 ºC). Investigation into gas flow rates highlighted their impact on current density, emphasizing the importance of optimizing hydrogen and oxygen flow rates for enhanced cell performance.