Fig. 4: Electrocatalytic performance and MEA performance of L10-PtFe@PtPdsub/C.
From: Atomic diffusion pathway mediated subsurface engineering
a ORR polarization curve of L10-PtFe@Pt/C, L10-PtFe@PtPdsub/C, and commercial Pt/C in O2-saturated 0.1 M HClO4 (pH = 1.01 ± 0.03; electrode surface area, 0.196 cm2; rotating speed, 1600 rpm; scan rate, 10 mV s−1). The iR was determined to be 19.7 ± 3.51 Ω. b MA and SA of the as-prepared catalysts at 0.9 V versus RHE. The error bars correspond to the standard deviation derived from five independent measurements. c ORR polarization curves of L10-PtFe@PtPdsub/C in O2-saturated 0.1 M HClO4 (pH = 1.01 ± 0.03; electrode surface area, 0.196 cm2; rotating speed, 1600 rpm; scan rate, 10 mV s−1) before and after ADT. The iR was determined to be 19.7 ± 3.51 Ω. d The MA and ECSA of L10-PtFe@PtPdsub/C before and after ADT. e H2-air single-cell polarization curves and power density plots of the L10-PtFe/PtPdsub cathodes before (BOL) and after (EOL) AST test. Test conditions: cathode loading of 0.1 mgPt cm−2, 80 °C, 100% relative humidity, 150 kPaabs. f MA at 0.9 V in H2–O2 fuel cells and the current density at 0.7 V in H2-air fuel cells before and after AST test. Source data for the electrocatalytic performance data are provided as a Source Data file.
