Study on methanol-resistant MEA for DMFCs

Pd/Nafion composite membrane was prepared by electroless chemical deposition. DMFC with Pd/Nafion composite membrane was studied at low temperature and high concentration by limiting current density, cyclic voltammetry and anode polarization methods. The results show that Pd layer has no obvious catalytic effect on electro-oxidation of methanol, the permeability of methanol is suppressed effectively at high concentration, methanol permeation limiting current density decreases from 267 mA/cm2 to 170 mA/cm2 for 5 mol/L methanol at 30 ℃; reaction order of methanol oxidation at low temperature is not zero.