Fig. 3: Performance tests with Fe–NC and Fe–NCBrCl as the cathode catalysts in a single-cell PEMFCs. | Nature Communications

Fig. 3: Performance tests with Fe–NC and Fe–NCBrCl as the cathode catalysts in a single-cell PEMFCs.

From: A Fe-NC electrocatalyst boosted by trace bromide ions with high performance in proton exchange membrane fuel cells

Fig. 3

a H2-O2 PEMFCs polarization curves. Cathode, ~3.5 mgcat cm−2 for Fe–NC and 0.2 mgPt cm−2 for Pt/C; anode, 0.4 mgPt cm−2 Pt/C; GORE-SELECT® membrane (15 μm thickness); 0.3 L H2 min−1 and 0.4 L O2 min−1 feed, 100% relative humidity (RH), 250 kPa absolute partial pressure H2 and O2, 80 °C, electrode area 1.21 cm2. The cell voltage and power density are not iR corrected. b The polarization curves without (solid line) and with (dotted line) iR-correction and HFR under 250 kPaabs H2-O2 PEMFCs. c Current densities at 0.8 ViR-free and 0.7 ViR-free. d Tafel plots derived from the ORR polarization curves displayed in (c).

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