Fig. 13From: Recent developments of nano-structured materials as the catalysts for oxygen reduction reaction(reprinted with permission from Ref. [19] Copyright @ 2011 Macmillan Publishers Ltd: [Nature Communication])Polarization and power density curves of MEAs using NRE 211 membranes (Fe/Phen/Z8: blue, previous most active Fe-based catalyst: red, commercial Pt-based catalyst: green). a Polarization curves for MEAs, b power density curves corresponding to polarization curves in aBack to article page