Comparative study of methanol crossover across electropolymerized and commercial proton exchange membrane electrolytes for the acid direct methanol fuel cell

Fuel Cells - Fundamentals and Applications

“…An optimum concentration of methanol was considered to be around 1±2 M methanol in water (around 6% methanol in water). A higher concentration as well as a higher temperature in the cell increases the diffusion of methanol through the membrane [127][128][129] and, thus, lowers the cell performance. An optimised anode will oxidise more methanol from the feed and the methanol available for cross-over decreases leaving another factor to optimise in the DMFC [130].…”

Platinum and Non‐Platinum Nanomaterials for the Molecular Oxygen Reduction Reaction

“…This is one of the conditions required for an electrode material working as a cathode in a direct alcohol fuel cell (DAFC) due to the fuel crossover effect. [19][20][21][22][23] As it is well known, this process of ORR tolerance is not sustained on platinum-based cathodes in presence of methanol. [20,[24][25][26][27][28] This is the reason why electrocatalysts based on a non-platinum material-or better on non-precious metals-have to be developed.…”

Alcohol Crossover Behavior in Direct Alcohol Fuel Cells (DAFCs) System

“…(7), J i is flux of alcohols, D i is diffusion coefficient, L is membrane thickness (0.18 mm thickness), C bulk is anode side concentration of alcohols (2 M), and C vac is cathode side concentration of alcohols [12]. It was assumed C vac = 0 because cathode side was sweeped by oxygen gas [13]. Figure 3 showed the diffusion coefficients, which was calculated by Eq.…”