Impact of Carbon Support Meso?Porosity on Mass Transport and Performance of PEMFC Cathode Catalyst Layers

The analysis of the impact cathode catalyst layer pore structure on membrane electrode assembly (MEA) cell performance a PEMFC is presented. In this study, pristine CMK-3 carbon support material with well-defined in 3–6 nm range together two nitrogen-doped variants analyzed against commercial black to achieve better understanding porosity-performance relations. We used chemically N-doped learn more about effect porous supports concomitant transport properties and performance. Chemical treatment using cyanamide was conducted introduce variety N-functionalities. A detailed in-situ electrochemical investigation combined N2-physisorption analysis. Based their structural properties, mesopore fractions openings display major role for reducing oxygen resistance enhance Pt accessibility. find that hierarchically ordered mesoporosity superior disordered porosity prevalent micropore character: Analysis including adsorption active surface area (ECSA), Pt-accessibility, ionomer coverage, geometry, proton resistivity loss we conclude importance mesoporous its