Electrolytic H permeation through Fe membranes was measured simultaneously by means of a solid polymer electrolyte fuel cell and standard aqueous-phase H oxidation. Two configurations of polymer electrolyte fuel cell were tested: the first included a separate anode for H oxidation and the second used the Fe membrane surface itself, plated with Pd, as the anode. The results showed a limiting H permeation flux for the first configuration but not for the second, which yielded about 64% of the correct output.

Amperometric Hydrogen Permeation Measurement in Iron using Solid Polymer Electrolyte Fuel Cells. H.C.Ng, R.C.Newman: Corrosion Science, 2005, 47[5], 1197-210