„Recognized by sound“

Determining Proton Transport in Pseudo Catalyst Layers Using Hydrogen Pump DC and AC Techniques

“…´-S cm −1 at 120 RH. Comparing ionic conductivity in the range of 50%-100% RH reported here to that reported by Iden et al, 20 which also used HP set-up with a PCL of I/ C of 0.9 and Ketjenblack carbon support, these values are 2-4 times lower. The conductivity values reported in this study for the PCL cannot be directly compared to Iden et al study, as different carbon support and processing were used.…”

“…16 A promising alternative method has been previously reported, a so-called hydrogen pump (HP) method, where a pseudo CL (PCL) is sandwiched between two membranes in a standard PEFC setup. 20,21 Hydrogen oxidation reaction (HOR) occurs on anode, protons are transported through membrane, PCL and another membrane to recombine with electrons in hydrogen evolution reaction (HER) on the cathode. In Iden et al 20 work a single PCL was used, where membrane and contact resistances were either directly measured without PCL or extrapolated from high frequency resistance (HFR).…”

“…20,21 Hydrogen oxidation reaction (HOR) occurs on anode, protons are transported through membrane, PCL and another membrane to recombine with electrons in hydrogen evolution reaction (HER) on the cathode. In Iden et al 20 work a single PCL was used, where membrane and contact resistances were either directly measured without PCL or extrapolated from high frequency resistance (HFR). The disadvantage of this method is that Pt cannot be used in the sandwiched layer because hydrogen that crosses through the membrane will react and transport the current electrically.…”