Fig. 3: Electrochemical characterization of baseline Pt/C vs. IL-modified Pt/C samples in rotating disk electrode setup and IL/C ratio optimization in MEAs containing various loading of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C4mim]+[NTf2]−) evaluated at 80 °C and 100% RH.
From: Revealing the role of ionic liquids in promoting fuel cell catalysts reactivity and durability
a Cyclic voltammograms of baseline Pt/C and IL-modified Pt/C in N2-saturated 0.1 M HClO4, b polarization activity in O2-saturated 0.1 M HClO4 at a rotation speed of 1600 rpm. c Nyquist plots of impedance spectra under N2-saturated 0.1 M HClO4 for Pt/C-Nafion and Pt/C-IL-Nafion catalyst layers. d H2/air polarization curves of MEAs with IL/C ratio of 0.64, 1.28. 2.56 vs. baseline Pt/C in fuel cell, e power density obtained at 150 kPaabs total pressure, f H2/O2 Tafel plots measured at 150 kPaabs total pressure in 5 cm2 differential cells, cathode: HSA Pt/C or HSA Pt/C-IL with loading 0.13 ± 0.02 mg cm−2, anode: LSA Pt/C with loading 0.1 mg cm−2.
