CARBON SUPPORT EFFECTS ON PEFC PERFORMANCE ANALYZED BY REACTION AND MASS TRANSPORT SIMULATION IN CATALYST LAYER

Abstract

The catalyst layers (CLs) structure is needed to design while catalysts are efficiently used without loss. CLs structure is influenced morphology of carbon supports. In this study, Porous and non-porous catalyst was compared to reveal difference of supports by overpotential breakdown. The results indicate oxygen diffusion overpotential requires to improve porosity in CLs of porous catalyst. Interparticle correlation of porous catalyst in the ink is dominated attractive force. Porous catalyst is easy to agglomerate secondary particles compared to non-porous one. Therefore, controlling agglomeration of porous catalyst is effective to design the CLs structure for the improvement of performance.