Nanopore model evaluation

An obvious approach in evaluating the nanopore model would involve a measurement of the proton conductivity of a nanoporous layer with charged metallic walls as a function of the applied voltage. Proton concentration in a conductive nanoporous membrane is a function of (pP . Assuming bulk-like proton transport, the variation of... 

An initial evaluation of the nanopore model can be conducted by comparison with electrochemical performance data for MEAs that utilize UTCLs on the cathode side. The two types of experimental materials considered are nanoporous gold leafs plated with varying amounts of Pt (Pt-NPGL) (Zeis et al., 2007) and Pt NSTF layers of 3M (Pt-NSTF) (Debe et al., 2006). 

The membrane layer has to be carefully selected to be compatible with the resin and process cycle times and pressure. Models have been developed to evaluate the effective permeability of the membrane as a function of its nanoporous structure and the resin-membrane interaction. The models can be used to evaluate the penetration time of the membrane or the allowable... 

A model of the ORR in a single water-filled pore with charged walls of Pt will be presented. It affords the definition of an effectiveness factor, by which the performance of any nanoporous CL material could be evaluated. Furthermore, a remarkable conclusion is drawn in view of the coupling of ORR kinetics and metal corrosive dissolution. 

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