| 초록 |
Proton exchange membrane fuel cells (PEMFCs) using hydrogen as a fuel are being developed to replace batteries in portable electronic devices and internal combustion engines on account of their high energy efficiency, low pollutant emission and low working temperature. To effectively utilize the Pt electro-catalysts, Pt must have simultaneous access to the gas, electron-conducting medium, and proton-conducting medium. Therefore, the catalyst layers must be relatively thin and porous to minimize the losses due to the rate of proton diffusion within the catalyst layer and the rate of mass transfer of the chemical reactants and products to and from the active sites. This study examined porous Pt-graphene/multiwalled carbon nanotube (MWCNT) composite cathodes prepared for PEMFCs along with their electro-chemical performance. |
