Catalytic Particle Aggregation in the MEA of DMFC Systems

Abstract

During the development of the Membrane Electrode Assembly in Direct Methanol Fuel Cells it is not unusual for the Pt and Pt-Ru particles to aggregate forming an uneven dispersion on the Proton Exchange Membrane. It has long been known that the aggregation occurs over time when the catalyst is stored and can to a large extent be dispersed again through vigorous mechanical shaking or sonication. This paper aims to determine the time needed in order to disperse the catalytic particles to a degree that is suitable for the production of MEAs in DMFC.