An approximate model for mass transfer with reaction inporous gas diffusion electrodes

✍ Scribed by M.B. Cutlip

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 554 KB
• Volume: 20
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(75)85013-4

✦ Synopsis

At&act-An approximate model for reactant mass transfer in fuel cell electrodes has been formulated which considers gaseous diffusion in the hydrophobic Teflon phase, diffusion across a thin electrolyte film at the surface of the catalyst phase, and internal diffusion with first order reaction in the electrolyte-filled catalyst phase. An analytical solution is presented which indicates the fraction of the "activation only" current density that is obtained from the electrode. Application of this model for low reactant concentrations should allow a more quantitative evaluation of important mass transfer processes in fuel cell electrodes.